CentOS ProjectSOCKET_ADVISORY.ASCVulnerability in use of socketpair
0.0004 Low
EPSS
Percentile
5.1%
IBM SECURITY ADVISORY
First Issued: Tue Jun 5 13:38:09 CDT 2012
| Updated: Wed Oct 3 10:13:19 CDT 2012
| Update: SP availability date and the lslpp assessment
| Update: New ifixes for the latest SP’s
| Updated: Thu Dec 12 12:55:11 CST 2013
| Update: 1. Added KEYs for parsing purposes
| 2. Moved to OpenSSL signature
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/socket_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/socket_advisory.asc
VULNERABILITY SUMMARY
VULNERABILITY: Vulnerability in use of socketpair
PLATFORMS: AIX 5.3, 6.1, and 7.1 releases
SOLUTION: Apply the fix as described below
THREAT: ‘socketpair()’ Local Denial of Service Vulnerability
CVE Number: CVE-2012-2192 CVSS=4.9
Reboot required? YES
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
DETAILED INFORMATION
I. DESCRIPTION
When socketpair calls are used on the system we could see a crash
in socket code path due to the fact that one of the socket is in
the free list
II. CVSS
CVSS Base Score: 4.9
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/76032 for the
current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:L/AC:L/Au:N/C:N/I:N/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.mp64
The following fileset levels are vulnerable:
AIX Fileset Lower Level Upper Level KEY
----------------------------------------------------------
bos.mp64 5.3.12.0 5.3.12.5 key_w_fs
| bos.mp64 6.1.6.0 6.1.6.19 key_w_fs
| bos.mp64 6.1.7.0 6.1.7.15 key_w_fs
| bos.mp64 7.1.0.0 7.1.0.19 key_w_fs
| bos.mp64 7.1.1.0 7.1.1.15 key_w_fs
IV. SOLUTIONS
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR number Availability KEY
-----------------------------------------------------------------
| 5.3.12 IV19178 Available SP6 key_w_apar
| 6.1.6 IV16603 Available SP9 key_w_apar
| 6.1.7 IV21128 Available SP5 key_w_apar
| 7.1.0 IV21131 Available SP7 key_w_apar
| 7.1.1 IV21235 Available SP5 key_w_apar
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV19178
http://www.ibm.com/support/docview.wss?uid=isg1IV16603
http://www.ibm.com/support/docview.wss?uid=isg1IV21128
http://www.ibm.com/support/docview.wss?uid=isg1IV21131
http://www.ibm.com/support/docview.wss?uid=isg1IV21235
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/socket_fix.tar
The link above is to a tar file containing this signed
advisory, fix packages, and OpenSSL 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) KEY
-------------------------------------------------------------------
5.3.12.5 IV19178s05.120514.epkg.Z key_w_fix
6.1.6.7 IV16603s07.120514.epkg.Z key_w_fix
| 6.1.6.8 IV16603s08.120712.epkg.Z key_w_fix
6.1.7.3 IV21128s03.120514.epkg.Z key_w_fix
| 6.1.7.4 IV21128s04.120621.epkg.Z key_w_fix
7.1.0.5 IV21131s05.120515.epkg.Z key_w_fix
| 7.1.0.6 IV21131s06.120924.epkg.Z key_w_fix
7.1.1.3 IV21235s03.120515.epkg.Z key_w_fix
| 7.1.1.4 IV21235s04.121002.epkg.Z key_w_fix
VIOS Level Interim Fix (*.Z)
-------------------------------------------------------------------
2.2.1.4-FP-25 SP-02 IV21128s04.VIOS2214.120531.epkg.Z
To extract the fixes from the tar file:
tar xvf socket_fix.tar
cd socket_fix
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
------------------------------------------------------------------
a904df000d7f990828f2f41a8c44ddce96e81164 IV16603s07.120514.epkg.Z
| 9c1c9c2744360dc19612a684146733962824b5d7 IV16603s08.120712.epkg.Z
d724639209b0bc9e90e8812d1ae6f6ff7e6a5588 IV19178s05.120514.epkg.Z
066359d8724b905769659664dc82323c011008a1 IV21128s03.120514.epkg.Z
| 456bb05800c5d1115645045f116ea0827b609d8d IV21128s04.120621.epkg.Z
d0b075ac9a6f6c249e8c93ae08c3bf0740ec6421 IV21128s04.VIOS2214.120531.epkg.Z
54b5f5a12301d9325993649e07b99e258aa6dfae IV21131s05.120515.epkg.Z
| 822a9c7f6471acfd56742c0e72e3ddf22dd52147 IV21131s06.120924.epkg.Z
4fca1e8928b520f72ff2c32198a15679299d2040 IV21235s03.120515.epkg.Z
| 4faf9fa7f3c0f72ffb2ca0d6509a8eaa7566677f IV21235s04.121002.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 OpenSSL 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
[email protected] and describe the discrepancy.
openssl dgst -sha1 -verify AIX_PSIRT_pub.asc -signature file.asc.sig file.asc
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
None
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:
[email protected]
To obtain the OpenSSL public key that can be used to verify the
signed advisories and ifixes:
Download the key from our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pubkey.txt
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:
[email protected]
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:
Note: Keywords labeled as KEY in this document are used for parsing purposes.
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/76032
CVE-2012-2192: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2192
*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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