[15016] in bugtraq
Filesystem vulnerability in AIX
daemon@ATHENA.MIT.EDU (salme@US.IBM.COM)
Wed May 24 14:29:34 2000
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Date: Tue, 23 May 2000 19:04:18 -0400
Reply-To: salme@US.IBM.COM
From: salme@US.IBM.COM
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To: BUGTRAQ@SECURITYFOCUS.COM
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IBM
EMERGENCY RESPONSE SERVICE
OUTSIDE ADVISORY REDISTRIBUTION
19 May 2000 14:30 GMT Number:
ERS-OAR-E01-2000:087.1
===============================================================================
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ERS is forwarding the following information from IBM. Contact
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===============================================================================
********************** FORWARDED INFORMATION STARTS HERE
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VULNERABILITY SUMMARY
VULNERABILITY: Filesystem vulnerability in AIX
PLATFORMS: IBM AIX(r) versions 3.2.x, 4.1.x, 4.2.x, 4.3.x
SOLUTION: Apply the fixes listed below.
THREAT: Non-privileged local users can gain write access
to some files.
===========================================================================
DETAILED INFORMATION
I. Description
Local users could gain write access to some files on local or remotely
mounted AIX filesystems, even though the file permissions do not allow
write access. This vulnerability was discovered in the IBM laboratory
during analysis of filesystem behavior and is not exposed during normal
system operation.
II. Impact
A local user could gain write access to some files on local or remotely
mounted AIX filesystems, even though the file permissions do not allow
write access.
III. Solutions
A. Official fix
The following fixes can be obtained from the AIX Fix Distribution
Service at the following URL:
http://techsupport.services.ibm.com/rs6k/fixes.html
AIX 3.2.x: APAR IY10111
AIX 4.1.x: APAR IY10031
AIX 4.2.x: APAR IY10001
AIX 4.3.x: APAR IY09941
In addition, an emergency fix specifically built to install on AIX
4.3.2 systems is available at the following URL:
ftp://aix.software.ibm.com/aix/efixes/iy09941
IV. Acknowledgements
Thanks to Pat Barrett and Dave Larson for bringing this problem to our
attention.
V. Obtaining Fixes
IBM AIX APARs may be ordered using Electronic Fix Distribution (via the
FixDist program), or from the IBM Support Center. For more information
on FixDist, and to obtain fixes via the Internet, please reference
http://techsupport.services.ibm.com/support/rs6000.support/downloads
or send electronic mail to "aixserv@austin.ibm.com" with the word
"FixDist" in the "Subject:" line. To facilitate ease of ordering all
security related APARs for each AIX release, security fixes are
periodically bundled into a cumulative APAR. For more information on
these cumulative APARs including last update and list of individual
fixes, send electronic mail to "aixserv@austin.ibm.com" with the word
"subscribe Security_APARs" in the "Subject:" line.
VI. Contact Information
Comments regarding the content of this announcement can be directed to
your local IBM support center or to:
security-alert@austin.ibm.com
To request the PGP public key that can be used to encrypt new AIX
security vulnerabilities, send email to security-alert@austin.ibm.com
with a subject of "get key".
If you would like to subscribe to the AIX security newsletter, send a
note to aixserv@austin.ibm.com with a subject of "subscribe Security".
To cancel your subscription, use a subject of "unsubscribe Security".
To see a list of other available subscriptions, use a subject of "help".
IBM and AIX are a registered trademark of International Business
Machines Corporation. All other trademarks are property of their
respective holders.
*********************** FORWARDED INFORMATION ENDS HERE
***********************
===============================================================================
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