Uočen je i ispravljen sigurnosni nedostatak vezan uz IBM AIX, inačice 5.3, 6.1 i 7.1. Lokalni zlonamjerni korisnici mogu iskoristiti ranjivost za dobivanje većih privilegija.
| Paket: | IBM AIX 5.x, IBM AIX 6.x, IBM AIX 7.x |
| Operacijski sustavi: | IBM AIX 5.x, IBM AIX 6.x, IBM AIX 7.x |
| Kritičnost: | 6.9 |
| Problem: | pogreška u programskoj funkciji |
| Iskorištavanje: | lokalno |
| Posljedica: | dobivanje većih privilegija |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2012-0745 |
| Izvorni ID preporuke: | IBM SECURITY ADVISORY |
| Izvor: | IBM |
| Problem: | |
| Uočena je pogreška u programskoj funkciji "getpwnam()". |
|
| Posljedica: | |
| Lokalni napadač može iskoristiti nedostatak za dobivanje većih privilegija. |
|
| Rješenje: | |
| Savjetuje se instalacija programskih zakrpa proizvođača ili primjena zaobilaznog rješenja (eng. workaround). Za više detalja preporuča se čitanje originalne sigurnosne preporuke. |
|
Izvorni tekst preporuke
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
IBM SECURITY ADVISORY
First Issued: Thu May 3 14:40:33 CDT 2012
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/ldapauth_advisory2.asc
===============================================================================
VULNERABILITY SUMMARY
VULNERABILITY: Vulnerability in LDAP Authentication
PLATFORMS: AIX 5.3, 6.1, and 7.1 releases
SOLUTION: Apply the fix as described below
THREAT: A local attacker could gain lateral or elevated privileges
CVE Number: CVE-2012-0745
Reboot required? NO
Workarounds? YES
Protected by FPM? NO
Protected by SED? NO
===============================================================================
DETAILED INFORMATION
I. DESCRIPTION
AIX could allow a local attacker to gain elevated privileges on the
system, caused by an error in the getpwnam() function when customer
extended LDAP user filtering is configured. A local attacker could
exploit this vulnerability to gain lateral or elevated privileges on
the system.
II. CVSS
CVSS Base Score: 6.9
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/74679 for the
current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:L/AC:M/Au:N/C:C/I:C/A:C)
III. PLATFORM VULNERABILITY ASSESSMENT
Note: To use the following commands on VIOS you must first
execute:
oem_setup_env
To determine if your system is vulnerable, execute the following
command:
lslpp -L bos.rte.security
The following fileset levels are vulnerable:
AIX Fileset Lower Level Upper Level
------------------------------------------------
bos.rte.security 5.3.12.0 5.3.12.4
bos.rte.security 6.1.5.0 6.1.5.7
bos.rte.security 6.1.6.0 6.1.6.17
bos.rte.security 6.1.7.0 6.1.7.2
bos.rte.security 7.1.0.0 7.1.0.17
bos.rte.security 7.1.1.0 7.1.1.2
IV. SOLUTIONS
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR number Availability
---------------------------------------------------
5.3.12 IV18638 6/13/12 sp6
6.1.5 IV19097 7/11/12 sp9
6.1.6 IV19077 6/12/12 sp8
6.1.7 IV18637 5/18/12 sp4
7.1.0 IV19098 6/13/12 sp6
7.1.1 IV18464 5/18/12 sp4
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV18638
http://www.ibm.com/support/docview.wss?uid=isg1IV19097
http://www.ibm.com/support/docview.wss?uid=isg1IV19077
http://www.ibm.com/support/docview.wss?uid=isg1IV18637
http://www.ibm.com/support/docview.wss?uid=isg1IV19098
http://www.ibm.com/support/docview.wss?uid=isg1IV18464
By subscribing, you will receive periodic email alerting you
to the status of the APAR, and a link to download the fix once
it becomes available.
B. FIXES
Fixes are available. The fixes can be downloaded via ftp
from:
ftp://aix.software.ibm.com/aix/efixes/security/ldapauth_fix2.tar
The link above is to a tar file containing this signed
advisory, fix packages, and PGP signatures for each package.
The fixes below include prerequisite checking. This will
enforce the correct mapping between the fixes and AIX
Technology Levels.
AIX Level Interim Fix (*.Z)
-------------------------------------------------------------------
5.3.12.5 IV18638s05.120406.epkg.Z
6.1.5.8 IV19097s8.120406.epkg.Z
6.1.6.7 IV19077s07.120406.epkg.Z
6.1.7.3 IV18637s03.120406.epkg.Z
7.1.0.5 IV19098s5.120406.epkg.Z
7.1.1.3 IV18464s3.120406.epkg.Z
VIOS Level Interim Fix (*.Z)
-------------------------------------------------------------------
2.2.1.3-FP-25 SP-01 IV18637s02.120419.epkg.Z
2.2.0.13-FP-24 SP-03 IV19077s05.120419.epkg.Z
2.1.3.10-FP23 IV19097s0.120419.epkg.Z
2.1.2.13-FP-22.1 SP-02 IV19862s03.120419.epkg.Z
2.1.1.10-FP21 IV19863s01.120419.epkg.Z
2.1.0.10-FP20.1 IV19864s02.120419.epkg.Z
To extract the fixes from the tar file:
tar xvf ldapauth_fix2.tar
cd ldapauth_fix2
Verify you have retrieved the fixes intact:
The checksums below were generated using the
"csum -h SHA1" (sha1sum) command is the followng:
csum -h SHA1 (sha1sum) filename
------------------------------------------------------------------
5acabc5f6d8a8defda907a789d2af03a237245c4 IV18464s3.120406.epkg.Z
46543c55fbdc7d2318d5a9371146fca59f512461 IV18637s02.120419.epkg.Z
5c76bec73cce06b4c6fde21c9c19fc43c71aabe3 IV18637s03.120406.epkg.Z
38ef5f2f94452dbc551e1d218a17fe356a9e28a3 IV18638s05.120406.epkg.Z
744776462d6d0623e5db3f92014a475d572e6bf7 IV19077s05.120419.epkg.Z
90324f5159cb5d7a4308eb90cd14806a97074300 IV19077s07.120406.epkg.Z
db0ed3207d530dcac4cdfb1561a9375ada42dde6 IV19097s0.120419.epkg.Z
02f2eb5a22b6ba7d944c7cf50e8a4508846ca369 IV19097s8.120406.epkg.Z
97b12e3d7ac33cd0805a180b47324089152bb831 IV19098s5.120406.epkg.Z
44680707328ccd275cf4598de79edb8553aa0aeb IV19862s03.120419.epkg.Z
c75b65cdaf71c1951eb0fbb9dbacebae0d11bc81 IV19863s01.120419.epkg.Z
8199f2a7f0e671bc4c51d5cde076f07152fb068b IV19864s02.120419.epkg.Z
To verify the sum, use the text of this advisory as input to sha1sum.
For example:
csum -h SHA1 -i Advisory.asc
sha1sum -c Advisory.asc
These sums should match exactly. The PGP signatures in the tar
file and on this advisory can also be used to verify the
integrity of the fixes. If the sums or signatures cannot be
confirmed, contact IBM AIX Security at
Ova e-mail adresa je zaštićena od spambota. Potrebno je omogućiti JavaScript da je vidite. and describe the discrepancy.
C. FIX AND INTERIM FIX INSTALLATION
IMPORTANT: If possible, it is recommended that a mksysb backup
of the system be created. Verify it is both bootable and
readable before proceeding.
To preview a fix installation:
installp -a -d fix_name -p all # where fix_name is the name of the
# fix package being previewed.
To install a fix package:
installp -a -d fix_name -X all # where fix_name is the name of the
# fix package being installed.
Interim fixes have had limited functional and regression
testing but not the full regression testing that takes place
for Service Packs; thus, IBM does not warrant the fully
correct functionality of an interim fix.
Interim fix management documentation can be found at:
http://www14.software.ibm.com/webapp/set2/sas/f/aix.efixmgmt/home.html
To preview an interim fix installation:
emgr -e ipkg_name -p # where ipkg_name is the name of the
# interim fix package being previewed.
To install an interim fix package:
emgr -e ipkg_name -X # where ipkg_name is the name of the
# interim fix package being installed.
V. WORKAROUNDS
Disable extended LDAP user filtering in ldap.cfg
VI. OBTAINING FIXES
AIX security fixes can be downloaded from:
ftp://aix.software.ibm.com/aix/efixes/security
AIX fixes can be downloaded from:
http://www.ibm.com/eserver/support/fixes/fixcentral/main/pseries/aix
NOTE: Affected customers are urged to upgrade to the latest
applicable Technology Level and Service Pack.
VII. CONTACT INFORMATION
If you would like to receive AIX Security Advisories via email,
please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd
Comments regarding the content of this announcement can be
directed to:
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To request the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:
A. Send an email with "get key" in the subject line to:
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B. Download the key from a PGP Public Key Server. The key ID is:
0x28BFAA12
Please contact your local IBM AIX support center for any
assistance.
eServer is a trademark of International Business Machines
Corporation. IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation. All other trademarks
are property of their respective holders.
VIII. REFERENCES:
Complete CVSS Guide: http://www.first.org/cvss/cvss-guide.html
On-line Calculator V2: http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2
X-Force Vulnerability Database: http://xforce.iss.net/xforce/xfdb/74679
CVE-2012-0745: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0745
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the
impact of this vulnerability in their environments by accessing the links
in the Reference section of this Flash.
Note: According to the Forum of Incident Response and Security Teams
(FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry
open standard designed to convey vulnerability severity and help to
determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES
"AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE
RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY
VULNERABILITY.
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