CentOS ProjectPTRACE_ADVISORY.ASCAIX ptrace Vulnerability
EPSS
Percentile
5.1%
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IBM SECURITY ADVISORY
First Issued: Fri May 2 09:58:11 CDT 2014
| Updated: Tue May 20 14:12:02 CDT 2014
| Update: VIOS level clarification
| Update: Corrected APARs
| Update: New tar file with missing Iterim Fix
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/ptrace_advisory.asc
https://aix.software.ibm.com/aix/efixes/security/ptrace_advisory.asc
ftp://aix.software.ibm.com/aix/efixes/security/ptrace_advisory.asc
===============================================================================
VULNERABILITY SUMMARY
VULNERABILITY: ptrace vulnerability in AIX
PLATFORMS: 5.3, 6.1 and 7.1 releases
VIOS 2.2.*
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2014-0930
Reboot required? YES
Workarounds? NO
Protected by FPM? NO
Protected by SED? NO
===============================================================================
DETAILED INFORMATION
I. DESCRIPTION
IBM AIX is vulnerable to a denial of service, caused by an
error in the ptrace() function. A local attacker could exploit
this vulnerability to cause a system crash.
II. CVSS
CVSS Base Score: 4.7
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92262
for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:M/Au:N/C:N/I:N/A:C)
III. PLATFORM VULNERABILITY ASSESSMENT
The following fileset levels are vulnerable:
AIX Fileset Lower Level Upper Level
--------------------------------------------------------
bos.mp64 5.3.12.0 5.3.12.9
bos.mp64 6.1.7.0 6.1.7.20
bos.mp64 6.1.8.0 6.1.8.17
bos.mp64 6.1.9.0 6.1.9.2
bos.mp64 7.1.1.0 7.1.1.20
bos.mp64 7.1.2.0 7.1.2.17
bos.mp64 7.1.3.0 7.1.3.2
AIX Fileset (VIOS) Lower Level Upper Level
----------------------------------------------------------------
| bos.mp64 6.1.7.0(2.2.1.0) 6.1.7.20(2.2.1.8)
| bos.mp64 6.1.8.0(2.2.2.0) 6.1.8.17(2.2.2.4)
| bos.mp64 6.1.9.0(2.2.3.0) 6.1.9.2 (2.2.3.2)
NOTE: To find out whether the affected filesets are installed on your
systems, refer to the lslpp command found in AIX user's guide.
| Note: To use the following commands on VIOS you must first execute:
|
| oem_setup_env
IV. SOLUTIONS
A. APARS
IBM has assigned the following APARs to this problem:
AIX Level APAR number Availability
---------------------------------------------------
5.3.12 IV59675 NOW (ifix only)
6.1.7 IV59045 08/29/2014 SP10
6.1.8 IV58948 08/29/2014 SP5
| 6.1.9 IV59615 06/03/2014 SP3
7.1.1 IV58888 08/29/2014 SP10
7.1.2 IV58861 08/29/2014 SP5
| 7.1.3 IV59607 06/03/2014 SP3
VIOS Level APAR number Availability
---------------------------------------------------
2.2.1 IV59045 08/29/2014 2.2.1.9
2.2.2 IV58948 08/29/2014 2.2.2.5
| 2.2.3 IV59615 06/03/2014 2.2.3.3
Subscribe to the APARs here:
http://www.ibm.com/support/docview.wss?uid=isg1IV59675
http://www.ibm.com/support/docview.wss?uid=isg1IV59045
http://www.ibm.com/support/docview.wss?uid=isg1IV58948
| http://www.ibm.com/support/docview.wss?uid=isg1IV59615
http://www.ibm.com/support/docview.wss?uid=isg1IV58888
http://www.ibm.com/support/docview.wss?uid=isg1IV58861
| http://www.ibm.com/support/docview.wss?uid=isg1IV59607
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/ptrace_ifix.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) KEY
-------------------------------------------------------------------
| 5.3.12.9 IV59675s9.140425.epkg.Z key_w_fix
6.1.7.9 IV59045s9a.140425.epkg.Z key_w_fix
6.1.8.4 IV58948s4a.140423.epkg.Z key_w_fix
6.1.9.2 IV59615s2a.140422.epkg.Z key_w_fix
7.1.1.9 IV58888s9a.140422.epkg.Z key_w_fix
7.1.2.4 IV58861s4a.140422.epkg.Z key_w_fix
7.1.3.2 IV59607s2a.140422.epkg.Z key_w_fix
VIOS Level Interim Fix (*.Z)
-------------------------------------------------------------------
2.2.1.8 IV59045s9a.140425.epkg.Z
2.2.2.4 IV58948s4a.140423.epkg.Z
2.2.3.2 IV59615s2a.140422.epkg.Z
To extract the fixes from the tar file:
tar xvf ptrace_ifix.tar
cd ptrace_ifix
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
------------------------------------------------------------------
5e22ab05c16f9342ceee696502bfc627cc564caa IV59675s9.140425.epkg.Z
7a16afdcc8cce7292cebd0f605d3781212846367 IV59045s9a.140425.epkg.Z
14496c55b2a9a018276925e4e2ff4bf1f1ba4cea IV58948s4a.140423.epkg.Z
8e0ce12532f71700392e64b1bd11b71167f590e9 IV59615s2a.140422.epkg.Z
b0afc298e76594ed34e934a3bf45264ec4e97a4e IV58888s9a.140422.epkg.Z
1a967e881f6d5f33ca37e8652a3f9bacc0c322e9 IV58861s4a.140422.epkg.Z
4986d689cb6013d1a0f58980f735a3cbc468d8d2 IV59607s2a.140422.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
[email protected] 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; however, IBM does fully support them.
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
There are no workarounds.
VI. CONTACT INFORMATION
If you would like to receive AIX Security Advisories via email,
please visit:
http://www.ibm.com/systems/support
and click on the "My notifications" link.
To view previously issued advisories, please visit:
| http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq
Comments regarding the content of this announcement can be
directed to:
[email protected]
To obtain 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 our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt
C. 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.
VII. ACKNOWLEDGEMENT
This vulnerability was reported by Tim Brown from Portcullis Computer
Security Ltd.
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/92262
CVE-2014-0930: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0930
*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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