U radu jezgre operacijskog sustava Linux uočeni su višestruki sigurnosni nedostaci koje zlonamjerni korisnik može iskoristiti za otkrivanje osjetljivih informacija i izvođenje DoS napada.
| Paket: | Linux kernel 2.6.x |
| Operacijski sustavi: | SUSE Linux Enterprise Desktop 10, SUSE Linux Enterprise Server (SLES) 10 |
| Kritičnost: | 6.3 |
| Problem: | cjelobrojno prepisivanje, pogreška u programskoj funkciji |
| Iskorištavanje: | lokalno/udaljeno |
| Posljedica: | otkrivanje osjetljivih informacija, uskraćivanje usluga (DoS) |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2011-0726, CVE-2011-1017, CVE-2011-1093, CVE-2011-1494, CVE-2011-1495, CVE-2011-1585, CVE-2011-1593, CVE-2011-1745, CVE-2011-1746, CVE-2011-2022, CVE-2011-2182, CVE-2011-2484, CVE-2011-2491, CVE-2011-2496 |
| Izvorni ID preporuke: | SUSE-SA:2011:034 |
| Izvor: | SUSE |
| Problem: | |
| Bitniji su propusti posljedica prepisivanja cjelobrojne varijable u nekoliko programskih funkcija (dccp_rcv_state_process, add_del_listener, agp_generic_insert_memory, agp_generic_remove_memory, itd). |
|
| Posljedica: | |
| Napadaču omogućuju izvođenje napada uskraćivanjem usluge te otkrivanje osjeltljivih informacija. |
|
| Rješenje: | |
| Korisnicima se preporuča korištenje odgovarajuće nadogradnje. |
|
Izvorni tekst preporuke
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
______________________________________________________________________________
SUSE Security Announcement
Package: kernel
Announcement ID: SUSE-SA:2011:034
Date: Fri, 12 Aug 2011 13:00:00 +0000
Affected Products: SUSE Linux Enterprise Desktop 10 SP4
SLE SDK 10 SP4
SUSE Linux Enterprise Server 10 SP4
Vulnerability Type: remote denial of service, potential local
privilege escalation
CVSS v2 Base Score: 7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)
SUSE Default Package: yes
Cross-References: CVE-2011-0726, CVE-2011-1017, CVE-2011-1093
CVE-2011-1494, CVE-2011-1495, CVE-2011-1585
CVE-2011-1593, CVE-2011-1745, CVE-2011-1746
CVE-2011-2022, CVE-2011-2182, CVE-2011-2484
CVE-2011-2491, CVE-2011-2496
Content of This Advisory:
1) Security Vulnerability Resolved:
Linux kernel security update
Problem Description
2) Solution or Work-Around
3) Special Instructions and Notes
4) Package Location and Checksums
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
none
6) Authenticity Verification and Additional Information
______________________________________________________________________________
1) Problem Description and Brief Discussion
This kernel update for the SUSE Linux Enterprise 10 SP4 kernel fixes
several security issues and bugs.
Following security issues were fixed:
CVE-2011-1093: The dccp_rcv_state_process function in net/dccp/input.c
in the Datagram Congestion Control Protocol (DCCP) implementation
in the Linux kernel did not properly handle packets for a CLOSED
endpoint, which allowed remote attackers to cause a denial of service
(NULL pointer dereference and OOPS) by sending a DCCP-Close packet
followed by a DCCP-Reset packet.
CVE-2011-2484: The add_del_listener function in kernel/taskstats.c
in the Linux kernel did not prevent multiple registrations of exit
handlers, which allowed local users to cause a denial of service
(memory and CPU consumption), and bypass the OOM Killer, via a
crafted application.
CVE-2011-1745: Integer overflow in the agp_generic_insert_memory
function in drivers/char/agp/generic.c in the Linux kernel allowed
local users to gain privileges or cause a denial of service (system
crash) via a crafted AGPIOC_BIND agp_ioctl ioctl call.
CVE-2011-1746: Multiple integer overflows in the (1)
agp_allocate_memory and (2) agp_create_user_memory functions in
drivers/char/agp/generic.c in the Linux kernel allowed local users to
trigger buffer overflows, and consequently cause a denial of service
(system crash) or possibly have unspecified other impact, via vectors
related to calls that specify a large number of memory pages.
CVE-2011-2022: The agp_generic_remove_memory function in
drivers/char/agp/generic.c in the Linux kernel before 2.6.38.5 did
not validate a certain start parameter, which allowed local users
to gain privileges or cause a denial of service (system crash) via a
crafted AGPIOC_UNBIND agp_ioctl ioctl call, a different vulnerability
than CVE-2011-1745.
CVE-2011-1585: When using a setuid root mount.cifs, local users could
hijack password protected mounted CIFS shares of other local users.
CVE-2011-0726: The do_task_stat function in fs/proc/array.c in the
Linux kernel did not perform an expected uid check, which made it
easier for local users to defeat the ASLR protection mechanism by
reading the start_code and end_code fields in the /proc/#####/stat
file for a process executing a PIE binary.
CVE-2011-2496: The normal mmap paths all avoid creating a mapping
where the pgoff inside the mapping could wrap around due to
overflow. However, an expanding mremap() can take such a non-wrapping
mapping and make it bigger and cause a wrapping condition.
CVE-2011-2491: A local unprivileged user able to access a NFS
filesystem could use file locking to deadlock parts of an nfs server
under some circumstance.
CVE-2011-1017,CVE-2011-2182: The code for evaluating LDM partitions
(in fs/partitions/ldm.c) contained bugs that could crash the kernel
for certain corrupted LDM partitions.
CVE-2011-1593: Multiple integer overflows in the next_pidmap function
in kernel/pid.c in the Linux kernel allowed local users to cause a
denial of service (system crash) via a crafted (1) getdents or (2)
readdir system call.
CVE-2011-1494: Integer overflow in the _ctl_do_mpt_command function
in drivers/scsi/mpt2sas/mpt2sas_ctl.c in the Linux kernel might have
allowed local users to gain privileges or cause a denial of service
(memory corruption) via an ioctl call specifying a crafted value that
triggers a heap-based buffer overflow.
CVE-2011-1495: drivers/scsi/mpt2sas/mpt2sas_ctl.c in the Linux kernel
did not validate (1) length and (2) offset values before performing
memory copy operations, which might have allowed local users to gain
privileges, cause a denial of service (memory corruption), or obtain
sensitive information from kernel memory via a crafted ioctl call,
related to the _ctl_do_mpt_command and _ctl_diag_read_buffer functions.
2) Solution or Work-Around
There is no known workaround, please install the update packages.
3) Special Instructions and Notes
Please reboot the machine after installing the update.
4) Package Location and Checksums
The preferred method for installing security updates is to use the YaST
"Online Update" module or the "zypper" commandline tool. The package and
patch management stack will detect which updates are required and
automatically perform the necessary steps to verify and install them.
Alternatively, download the update packages for your distribution manually
and verify their integrity by the methods listed in Section 6 of this
announcement. Then install the packages using the command
rpm -Fhv <file.rpm>
to apply the update, replacing <file.rpm> with the filename of the
downloaded RPM package.
Our maintenance customers are notified individually. The packages are
offered for installation from the maintenance web:
SUSE Linux Enterprise Desktop 10 SP4 for x86
http://download.novell.com/patch/finder/?keywords=75c70ba80807aed777189444e17910e5
SUSE Linux Enterprise Desktop 10 SP4
http://download.novell.com/patch/finder/?keywords=2284bd78d78b00accc68729a9634d92d
http://download.novell.com/patch/finder/?keywords=75c70ba80807aed777189444e17910e5
SLE SDK 10 SP4
http://download.novell.com/patch/finder/?keywords=2284bd78d78b00accc68729a9634d92d
http://download.novell.com/patch/finder/?keywords=0e9208ee65c884d152a545b8766938bc
http://download.novell.com/patch/finder/?keywords=3b9cb9db7d375a34d07fb460aad8137b
http://download.novell.com/patch/finder/?keywords=75c70ba80807aed777189444e17910e5
SUSE Linux Enterprise Server 10 SP4
http://download.novell.com/patch/finder/?keywords=2284bd78d78b00accc68729a9634d92d
http://download.novell.com/patch/finder/?keywords=5f3e206eac108e161bdd1b3928ce7c3e
http://download.novell.com/patch/finder/?keywords=0e9208ee65c884d152a545b8766938bc
http://download.novell.com/patch/finder/?keywords=3b9cb9db7d375a34d07fb460aad8137b
http://download.novell.com/patch/finder/?keywords=75c70ba80807aed777189444e17910e5
SUSE Linux Enterprise Desktop 10 SP4 for AMD64 and Intel EM64T
http://download.novell.com/patch/finder/?keywords=2284bd78d78b00accc68729a9634d92d
______________________________________________________________________________
5) Pending Vulnerabilities, Solutions, and Work-Arounds:
none
______________________________________________________________________________
6) Authenticity Verification and Additional Information
- Announcement authenticity verification:
SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.
To verify the signature of the announcement, save it as text into a file
and run the command
gpg --verify <file>
replacing <file> with the name of the file where you saved the
announcement. The output for a valid signature looks like:
gpg: Signature made <DATE> using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>"
where <DATE> is replaced by the date the document was signed.
If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command
gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc
- Package authenticity verification:
SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and the integrity of
a package needs to be verified to ensure that it has not been tampered
with.
The internal rpm package signatures provide an easy way to verify the
authenticity of an RPM package. Use the command
rpm -v --checksig <file.rpm>
to verify the signature of the package, replacing <file.rpm> with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. with the key ID 9C800ACA.
This key is automatically imported into the RPM database (on
RPMv4-based distributions) and the gpg key ring of 'root' during
installation. You can also find it on the first installation CD and at
the end of this announcement.
- SUSE runs two security mailing lists to which any interested party may
subscribe:
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- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
<Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.
Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.
- SUSE's announce-only mailing list.
Only SUSE's security announcements are sent to this list.
To subscribe, send an e-mail to
<Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>.
=====================================================================
SUSE's security contact is <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.>.
The <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.> public key is listed below.
=====================================================================
______________________________________________________________________________
The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way. In particular, the
clear text signature should show proof of the authenticity of the text.
SUSE Linux Products GmbH provides no warranties of any kind whatsoever
with respect to the information contained in this security advisory.
Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite.>
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