Otkrivene su dvije sigurnosne ranjivosti paketa Cisco IOS, a obje ranjivosti udaljeni napadač može iskoristiti za izvođenje DoS napada.
| Paket: | Cisco IOS 12.x, Cisco IOS 15.x, Cisco IOS XE 2.x, Cisco IOS XE 3.x |
| Operacijski sustavi: | Cisco IOS 12.x, Cisco IOS 15.0, Cisco IOS 15.1, Cisco IOS XE 2.x, Cisco IOS XE 3.x |
| Kritičnost: | 6.4 |
| Problem: | neodgovarajuće rukovanje pogreškama |
| Iskorištavanje: | udaljeno |
| Posljedica: | uskraćivanje usluga (DoS) |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2011-3274, CVE-2011-3282 |
| Izvorni ID preporuke: | cisco-sa-20110928-ipv6mpls |
| Izvor: | Cisco |
| Problem: | |
| Obje ranjivosti su posljedica nepravilne obrade IPv6 paketa kroz MPLS domenu. |
|
| Posljedica: | |
| Ranjivosti mogu iskoristiti udaljeni napadači slanjem više posebno oblikovanih IPv6 paketa, a posljedica napada je DoS stanje (ponovno pokretanje uređaja). |
|
| Rješenje: | |
| Svi korisnici se potiču na korištenje nadogradnje. |
|
Izvorni tekst preporuke
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Cisco Security Advisory: Cisco IOS Software IPv6 over MPLS
Vulnerabilities
Advisory ID: cisco-sa-20110928-ipv6mpls
Revision 1.0
For Public Release 2011 September 28 1600 UTC (GMT)
+---------------------------------------------------------------------
Summary
=======
Cisco IOS Software is affected by two vulnerabilities that cause a
Cisco IOS device to reload when processing IP version 6 (IPv6)
packets over a Multiprotocol Label Switching (MPLS) domain. These
vulnerabilities are:
* Crafted IPv6 Packet May Cause MPLS-Configured Device to Reload
* ICMPv6 Packet May Cause MPLS-Configured Device to Reload
Cisco has released free software updates that address these
vulnerabilities.
Workarounds that mitigate these vulnerabilities are available.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20110928-ipv6mpls.shtml.
Note: The September 28, 2011, Cisco IOS Software Security Advisory
bundled publication includes ten Cisco Security Advisories. Nine of the
advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses a vulnerability in Cisco Unified Communications
Manager. Each advisory lists the Cisco IOS Software releases that
correct the vulnerability or vulnerabilities detailed in the advisory as
well as the Cisco IOS Software releases that correct all vulnerabilities
in the September 2011 Bundled Publication.
Individual publication links are in "Cisco Event Response: Semiannual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep11.html
Affected Products
=================
Vulnerable Products
+------------------
Cisco IOS Software or Cisco IOS XE Software devices (hereafter both
referenced as Cisco IOS Software in this document) that are running
vulnerable versions of Cisco IOS Software and configured for MPLS are
affected by two vulnerabilities related to IPv6 traffic that
traverses an MPLS domain. The two vulnerabilities are independent of
each other.
Note: IPv6 does not need to be configured on the affected devices
themselves. The vulnerabilities do require the MPLS label switched
packets to have specific IPv6 payloads to be exploited.
To determine whether a device is configured for MPLS, log in to the
device and issue the command-line interface (CLI) command "show mpls
interface". If the IP state is "Yes", the device is vulnerable. The
following example shows a device that has MPLS configured on
interface Ethernet0/0:
Router#show mpls interface
Interface IP Tunnel BGP Static Operational
Ethernet0/0 Yes (ldp) No No No Yes
Router#
The following two examples show responses from a device with MPLS
forwarding disabled. The first example shows a return of no
interfaces:
router#show mpls interface
Interface IP Tunnel BGP Static Operational
routers#
In the second example, the device provides a message indicating that
MPLS forwarding is not configured:
router#show mpls interface
no MPLS apps enabled or MPLS not enabled on any interfaces
router#
To determine the Cisco IOS Software release that is running on a Cisco
product, administrators can log in to the device and issue the "show
version" command to display the system banner. The system banner
confirms that the device is running Cisco IOS Software by displaying
text similar to "Cisco Internetwork Operating System Software" or "Cisco
IOS Software." The image name displays in parentheses, followed by
"Version" and the Cisco IOS Software release name. Other Cisco devices
do not have the "show version" command or may provide different output.
The following example identifies a Cisco product that is running
Cisco IOS Software Release 15.0(1)M1 with an installed image name of
C3900-UNIVERSALK9-M:
Router> show version
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version
15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 17:17 by prod_rel_team
!--- output truncated
Additional information about Cisco IOS Software
release naming conventions is available in the white
paper Cisco IOS and NX-OS Software Reference Guide at
http://www.cisco.com/web/about/security/intelligence/ios-ref.html.
Products Confirmed Not Vulnerable
+--------------------------------
Devices that are not configured for MPLS are not vulnerable.
The following products have been confirmed not to be affected by
these vulnerabilities:
* Cisco IOS XR Software
No other Cisco products are currently known to be affected by these
vulnerabilities.
Details
=======
The packet handling nodes in an MPLS network are called provider
routers (P routers) and provider edge routers (PE routers) and are
configured with MPLS. Both P and PE routers are vulnerable to both
the vulnerabilities disclosed in this advisory.
In networks that have MPLS enabled and could carry MPLS label
switched packets with IPv6 payloads, the device may crash when
processing MPLS label switched packets with specific IPv6 payloads.
Typical deployment scenarios that would be affected by either
vulnerability would be Cisco IPv6 Provider Edge Router (6PE) or IPv6
VPN Provider Edge Router (6VPE).
Crafted IPv6 Packet May Cause MPLS-Configured Device to Reload
+-------------------------------------------------------------
A crafted IPv6 packet may cause the device to crash when the packet
is processed by Cisco IOS Software because the MPLS TTL has expired.
The crafted packet used to exploit this vulnerability would be
silently discarded in Cisco IOS Software if received on an interface
where the packet did not have an MPLS label.
This vulnerability is documented in Cisco bug ID CSCto07919 and has been
assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2011-3274.
ICMPv6 Packet May Cause MPLS-Configured Device to Reload
+-------------------------------------------------------------
A valid ICMPv6 packet may cause the device to crash when the packet
is processed by Cisco IOS Software because the MPLS TTL has expired.
The packet used to exploit this vulnerability would not affect Cisco
IOS Software if received on an interface where the packet did not
have an MPLS label.
This vulnerability is documented in Cisco bug ID CSCtj30155 and has been
assigned CVE ID CVE-2011-3282.
Vulnerability Scoring Details
=============================
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
* CSCto07919 ("Crafted IPv6 packet may cause MPLS configured device to
reload")
CVSS Base Score - 6.1
Access Vector - Adjacent Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 5.0
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
* CSCtj30155 ("ICMPv6 packet may cause MPLS configured device to
reload")
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
======
Successful exploitation of these vulnerabilities may cause the device
to reload. Repeated exploitation could result in a sustained denial
of service condition.
Software Versions and Fixes
===========================
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to determine
exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
Additionally, the Cisco IOS Software Checker is available on
the Cisco Security Intelligence Operations (SIO) portal at
http://tools.cisco.com/security/center/selectIOSVersion.x. It provides
several features for checking which Security Advisories affect specified
versions of Cisco IOS Software.
Cisco IOS Software
+-----------------
Each row of the following Cisco IOS Software table corresponds to a
Cisco IOS Software train. If a particular train is vulnerable, the
earliest releases that contain the fix are listed in the First Fixed
Release For This Advisory column. The First Fixed Release for All
Advisories in the September 2011 Bundled Publication column lists the
earliest possible releases that correct all the published
vulnerabilities in the Cisco IOS Software Security Advisory bundled
publication. Cisco recommends upgrading to the latest available
release, where possible.
+------------------------------------------------------------+
| Major | Availability of Repaired Releases |
| Release | |
|------------+-----------------------------------------------|
| Affected | | First Fixed Release |
| 12.0-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------------------------------------------------------|
| There are no affected 12.0-based releases |
|------------------------------------------------------------|
| Affected | | First Fixed Release |
| 12.1-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------+-----------------------+-----------------------|
| 12.1E | Not vulnerable | 12.2(18)SXF17b |
|------------+-----------------------+-----------------------|
| Affected | | First Fixed Release |
| 12.2-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------+-----------------------+-----------------------|
| 12.2 | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2B | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2BC | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2BW | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2BX | Not vulnerable | fixed in Release |
| | | 12.2SB |
|------------+-----------------------+-----------------------|
| 12.2BY | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2BZ | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2CX | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2CY | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2CZ | Not vulnerable | fixed in Release |
| | | 12.2SB |
|------------+-----------------------+-----------------------|
| 12.2DA | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2DD | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2DX | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2EU | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Releases up to and |
| 12.2EW | Not vulnerable | including 12.2(20)EW4 |
| | | are not vulnerable. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2EWA | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2EX | Not vulnerable | 12.2(55)EX3 |
|------------+-----------------------+-----------------------|
| 12.2EY | Not vulnerable | 12.2(58)EY |
|------------+-----------------------+-----------------------|
| | | Vulnerable; migrate |
| 12.2EZ | Not vulnerable | to any release in |
| | | 15.0SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2FX | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2FY | Not vulnerable | fixed in Release |
| | | 12.2EX |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2FZ | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; migrate |
| 12.2IRA | Not vulnerable | to any release in |
| | | 12.2IRG |
|------------+-----------------------+-----------------------|
| | | Vulnerable; migrate |
| 12.2IRB | Not vulnerable | to any release in |
| | | 12.2IRG |
|------------+-----------------------+-----------------------|
| | | Vulnerable; migrate |
| 12.2IRC | Not vulnerable | to any release in |
| | | 12.2IRG |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IRD | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IRE | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; migrate |
| 12.2IRF | Not vulnerable | to any release in |
| | | 12.2IRG |
|------------+-----------------------+-----------------------|
| 12.2IRG | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXA | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXB | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXC | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXD | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXE | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXF | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXG | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2IXH | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2JA | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2JK | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2MB | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2MC | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2MRA | Not vulnerable | fixed in Release |
| | | 12.2SRD |
|------------+-----------------------+-----------------------|
| 12.2MRB | Not vulnerable | 12.2(33)MRB5 |
|------------+-----------------------+-----------------------|
| | | Releases prior to |
| | | 12.2(30)S are |
| | | vulnerable; Releases |
| 12.2S | Not vulnerable | 12.2(30)S and later |
| | | are not vulnerable. |
| | | First fixed in |
| | | Release 12.2SB |
|------------+-----------------------+-----------------------|
| | | 12.2(31)SB20 |
| 12.2SB | Not vulnerable | |
| | | 12.2(33)SB10 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SBC | Not vulnerable | fixed in Release |
| | | 12.2SB |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SCA | Not vulnerable | fixed in Release |
| | | 12.2SCC |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SCB | Not vulnerable | fixed in Release |
| | | 12.2SCC |
|------------+-----------------------+-----------------------|
| 12.2SCC | Not vulnerable | 12.2(33)SCC7 |
|------------+-----------------------+-----------------------|
| 12.2SCD | Not vulnerable | 12.2(33)SCD6 |
|------------+-----------------------+-----------------------|
| | | 12.2(33)SCE1 |
| 12.2SCE | Not vulnerable | |
| | | 12.2(33)SCE2 |
|------------+-----------------------+-----------------------|
| 12.2SCF | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | 12.2(55)SE3 |
| 12.2SE | Not vulnerable | |
| | | 12.2(58)SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SEA | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SEB | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SEC | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SED | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SEE | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SEF | Not vulnerable | fixed in Release |
| | | 12.2SE |
|------------+-----------------------+-----------------------|
| | | Releases prior to |
| | | 12.2(25)SEG4 are |
| | | vulnerable; Releases |
| 12.2SEG | Not vulnerable | 12.2(25)SEG4 and |
| | | later are not |
| | | vulnerable. First |
| | | fixed in Release |
| | | 12.2EX |
|------------+-----------------------+-----------------------|
| | | Releases prior to |
| | | 12.2(53)SG4 are |
| 12.2SG | Not vulnerable | vulnerable; Releases |
| | | 12.2(53)SG4 and later |
| | | are not vulnerable. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2SGA | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2SL | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2SM | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2SO | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SQ | Not vulnerable | 12.2(50)SQ3 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SRA | Not vulnerable | fixed in Release |
| | | 12.2SRD |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SRB | Not vulnerable | fixed in Release |
| | | 12.2SRD |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SRC | Not vulnerable | fixed in Release |
| | | 12.2SRD |
|------------+-----------------------+-----------------------|
| 12.2SRD | Not vulnerable | 12.2(33)SRD6 |
|------------+-----------------------+-----------------------|
| 12.2SRE | 12.2(33)SRE4 | 12.2(33)SRE4 |
|------------+-----------------------+-----------------------|
| 12.2STE | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SU | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| | | Releases prior to |
| | | 12.2(29a)SV are |
| | | vulnerable; Releases |
| 12.2SV | Not vulnerable | 12.2(29a)SV and later |
| | | are not vulnerable. |
| | | Migrate to any |
| | | release in 12.2SVD |
|------------+-----------------------+-----------------------|
| 12.2SVA | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SVC | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SVD | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SVE | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2SW | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SX | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SXA | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SXB | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SXD | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SXE | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| 12.2SXF | Not vulnerable | 12.2(18)SXF17b |
|------------+-----------------------+-----------------------|
| 12.2SXH | Not vulnerable | 12.2(33)SXH8a |
|------------+-----------------------+-----------------------|
| 12.2SXI | Not vulnerable | 12.2(33)SXI6 |
|------------+-----------------------+-----------------------|
| 12.2SXJ | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2SY | Not vulnerable | 12.2(50)SY |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2SZ | Not vulnerable | fixed in Release |
| | | 12.2SB |
|------------+-----------------------+-----------------------|
| 12.2T | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2TPC | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2XA | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XB | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2XC | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XD | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XE | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XF | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XG | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XH | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XI | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XJ | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XK | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XL | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XM | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XN | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XNA | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNB | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNC | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XND | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNE | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| 12.2XNF | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| | | Releases prior to |
| | | 12.2(54)XO are |
| 12.2XO | Not vulnerable | vulnerable; Releases |
| | | 12.2(54)XO and later |
| | | are not vulnerable. |
|------------+-----------------------+-----------------------|
| 12.2XQ | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XR | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XS | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XT | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XU | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XV | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2XW | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2YA | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2YB | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2YC | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2YD | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2YE | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YF | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YG | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YH | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YJ | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2YK | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YL | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2YM | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YN | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2YO | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2YP | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YQ | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YR | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YS | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YT | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YU | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YV | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YW | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YX | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YY | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2YZ | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2ZA | Not vulnerable | fixed in Release |
| | | 12.2SXF |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2ZB | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2ZC | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2ZD | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2ZE | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZF | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZG | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 12.2ZH | Not vulnerable | Vulnerable; first |
| | | fixed in Release 12.4 |
|------------+-----------------------+-----------------------|
| 12.2ZJ | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2ZL | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 12.2ZP | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; first |
| 12.2ZU | Not vulnerable | fixed in Release |
| | | 12.2SXH |
|------------+-----------------------+-----------------------|
| 12.2ZX | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2ZY | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 12.2ZYA | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| Affected | | First Fixed Release |
| 12.3-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------------------------------------------------------|
| There are no affected 12.3-based releases |
|------------------------------------------------------------|
| Affected | | First Fixed Release |
| 12.4-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------------------------------------------------------|
| There are no affected 12.4-based releases |
|------------------------------------------------------------|
| Affected | | First Fixed Release |
| 15.0-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------+-----------------------+-----------------------|
| 15.0M | 15.0(1)M7 | 15.0(1)M7 |
|------------+-----------------------+-----------------------|
| | Vulnerable; contact | Vulnerable; contact |
| | your support | your support |
| | organization per the | organization per the |
| 15.0MR | instructions in the | instructions in the |
| | Obtaining Fixed | Obtaining Fixed |
| | Software section of | Software section of |
| | this advisory. | this advisory. |
|------------+-----------------------+-----------------------|
| | Vulnerable; contact | Vulnerable; contact |
| | your support | your support |
| | organization per the | organization per the |
| 15.0MRA | instructions in the | instructions in the |
| | Obtaining Fixed | Obtaining Fixed |
| | Software section of | Software section of |
| | this advisory. | this advisory. |
|------------+-----------------------+-----------------------|
| 15.0S | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 15.0SA | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 15.0SE | Not vulnerable | Not vulnerable |
|------------+-----------------------+-----------------------|
| 15.0SG | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| | Vulnerable; first | Vulnerable; first |
| 15.0XA | fixed in Release | fixed in Release |
| | 15.1T | 15.1T |
|------------+-----------------------+-----------------------|
| 15.0XO | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| Affected | | First Fixed Release |
| 15.1-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 15.1EY | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| | Vulnerable; first | Vulnerable; first |
| 15.1GC | fixed in Release | fixed in Release |
| | 15.1T | 15.1T |
|------------+-----------------------+-----------------------|
| 15.1M | 15.1(4)M1 | 15.1(4)M2; Available |
| | | on 30-SEP-11 |
|------------+-----------------------+-----------------------|
| | | Vulnerable; contact |
| | | your support |
| | | organization per the |
| 15.1MR | Not vulnerable | instructions in the |
| | | Obtaining Fixed |
| | | Software section of |
| | | this advisory. |
|------------+-----------------------+-----------------------|
| 15.1S | See Cisco IOS-XE | See Cisco IOS-XE |
| | Software Availability | Software Availability |
|------------+-----------------------+-----------------------|
| | 15.1(1)T4; Available | |
| | on 09-DEC-11 | 15.1(2)T4 |
| 15.1T | | |
| | 15.1(2)T4 | 15.1(1)T4 on |
| | | 8-Dec-2011 |
| | 15.1(3)T2 | |
|------------+-----------------------+-----------------------|
| | Vulnerable; first | Vulnerable; first |
| 15.1XB | fixed in Release | fixed in Release |
| | 15.1T | 15.1T |
|------------+-----------------------+-----------------------|
| Affected | | First Fixed Release |
| 15.2-Based | First Fixed Release | for All Advisories in |
| Releases | For This Advisory | the September 2011 |
| | | Bundled Publication |
|------------------------------------------------------------|
| There are no affected 15.2-based releases |
+------------------------------------------------------------+
Cisco IOS XE Software
+--------------------
Cisco IOS XE Software is affected by the vulnerability disclosed in
this document.
+------------------------------------------------------------+
| Cisco | First Fixed | First Fixed Release for All |
| IOS XE | Release For | Advisories in the September |
| Release | This Advisory | 2011 Bundled Publication |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.1.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.2.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.3.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.4.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.5.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 2.6.x | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| 3.1.xS | 3.1.4S | Vulnerable; migrate to 3.3.2S |
| | | or later |
|----------+----------------+--------------------------------|
| 3.1.xSG | Not vulnerable | Vulnerable; migrate to 3.2.0SG |
| | | or later |
|----------+----------------+--------------------------------|
| | Vulnerable; | |
| 3.2.xS | migrate to | Vulnerable; migrate to 3.3.2S |
| | 3.3.2S or | or later |
| | later | |
|----------+----------------+--------------------------------|
| 3.2.xSG | Not vulnerable | Not vulnerable |
|----------+----------------+--------------------------------|
| 3.3.xS | 3.3.2S | 3.3.2S |
|----------+----------------+--------------------------------|
| 3.4.xS | Not vulnerable | Not vulnerable |
+------------------------------------------------------------+
For mapping of Cisco IOS XE to Cisco IOS releases, please refer to
the Cisco IOS XE 2 Release Notes, Cisco IOS XE 3S Release Notes, and
Cisco IOS XE 3SG Release Notes.
Cisco IOS XR Software
+--------------------
Cisco IOS XR Software is not affected by the vulnerability disclosed
in this document.
Cisco IOS XR Software is not affected by any of the vulnerabilities
in the September 2011 bundled publication.
Workarounds
===========
For both vulnerabilities the following workaround applies:
Disabling MPLS TTL Propagation
+-----------------------------
Disabling MPLS TTL propagation will prevent exploitation of these
vulnerabilities. MPLS TTL propagation will have to be disabled on all
PE routers in the MPLS domain. To disable MPLS TTL propagation, enter
the global configuration command "no mpls ip propagate-ttl". If only "no
mpls ip propagate-ttl forward" is configured, the vulnerabilities could
still be exploited from within the MPLS domain.
For more information about the MPLS TTL propagation command, refer to
the configuration guide at:
http://www.cisco.com/en/US/docs/ios/mpls/command/reference/mp_m1.html#wp1013846
Obtaining Fixed Software
========================
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature
sets they have purchased. By installing, downloading, accessing
or otherwise using such software upgrades, customers agree to be
bound by the terms of Cisco's software license terms found at
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html,
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml.
Do not contact Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. or Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. for
software upgrades.
Customers with Service Contracts
+-------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com.
Customers using Third Party Support Organizations
+------------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
+----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
* +1 800 553 2447 (toll free from within North America)
* +1 408 526 7209 (toll call from anywhere in the world)
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Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to http://www.cisco.com/en/US/support/
tsd_cisco_worldwide_contacts.html for additional TAC contact
information, including localized telephone numbers, and instructions
and e-mail addresses for use in various languages.
Exploitation and Public Announcements
=====================================
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerabilities described in this advisory.
These vulnerabilities were discovered when handling customer support
calls.
Status of this Notice: FINAL
============================
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
============
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20110928-ipv6mpls.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
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Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
================
+------------------------------------------------------------+
| Revision 1.0 | 2011-September-28 | Initial public release |
+------------------------------------------------------------+
Cisco Security Procedures
=========================
Complete information on reporting security vulnerabilities
in Cisco products, obtaining assistance with security
incidents, and registering to receive security information
from Cisco, is available on Cisco's worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html.
This includes instructions for press inquiries regarding
Cisco security notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt.
+--------------------------------------------------------------------
Copyright 2010-2011 Cisco Systems, Inc. All rights reserved.
+--------------------------------------------------------------------
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