From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Feb 11 2005 - 16:38:19 CST

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TITLE:
IBM AIX ipl_varyon Privilege Escalation Vulnerability

SECUNIA ADVISORY ID:
SA14231

VERIFY ADVISORY:
http://secunia.com/advisories/14231/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

OPERATING SYSTEM:
AIX 5.x
http://secunia.com/product/213/

DESCRIPTION:
iDEFENSE has reported a vulnerability in IBM AIX, which can be
exploited by malicious, local users to gain escalated privileges.

The vulnerability is caused due to a boundary error in the ipl_varyon
program when handling arguments passed to the "-d" command line
option. This can be exploited to cause a stack-based buffer overflow
by passing an overly long string.

Successful exploitation allows users in the "system" group to execute
arbitrary code with root privileges.

The vulnerability affects AIX 5.1, 5.2 and 5.3.

SOLUTION:
Apply efixes.
ftp://aix.software.ibm.com/aix/efixes/security/ipl_varyon_efix.tar.Z

APARs will also be released to address the vulnerability.

APAR for AIX 5.1.0:
IY67812 (available approx. 2005-03-23)

APAR for AIX 5.2.0:
IY67750 (available approx. 2005-04-15)

APAR for AIX 5.3.0:
IY66933 (available approx. 2005-04-15)

PROVIDED AND/OR DISCOVERED BY:
iDEFENSE Labs

ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/application/poi/display?id=196&type=vulnerabilities

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