TITLE:
AIX Multiple Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA18088

VERIFY ADVISORY:
http://secunia.com/advisories/18088/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

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

DESCRIPTION:
David Litchfield has reported some vulnerabilities in AIX, which can
be exploited by malicious, local users to gain escalated privileges.

1) An unspecified boundary error exists in the suid root "slocal"
binary. This can be exploited to cause a buffer overflow, which
potentially allows arbitrary code execution with root privileges.

2) An unspecified boundary error exists in the suid root "muxatmd"
binary. This can be exploited to cause a buffer overflow, which
potentially allows arbitrary code execution with root privileges.

3) An unspecified input validation error exists in the suid root
"getShell" and "getCommand" utilities in the WebSM component. This
can be exploited to overwrite arbitrary files on the filesystem.

4) An unspecified boundary error in the malloc debug system can be
exploited to gain root privileges.

The vulnerabilities have been reported in AIX 5.1, 5.2 and 5.3.

SOLUTION:
Apply APARs or Interim Fix for vulnerability #1 and #2.
http://www-1.ibm.com/servers/eserver/support/pseries/aixfixes.html

APAR for AIX 5.1:
IY78224 (available approx. 2006-01-30)
IY78221 (available approx. 2006-01-30)
      
APAR for AIX 5.2:
IY78225 (available approx. 2006-01-30) 
IY78222 (available approx. 2006-01-30) 

APAR for AIX 5.3: 
IY78226 (available approx. 2006-01-30)
IY78223 (available approx. 2006-01-30)

Interim Fixes:
ftp://aix.software.ibm.com/aix/efixes/security/slocal_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/libisode_ifix.tar.Z

PROVIDED AND/OR DISCOVERED BY:
David Litchfield, NGSSoftware.

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