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TITLE:
IBM AIX Multiple Privilege Escalation Vulnerabilities

SECUNIA ADVISORY ID:
SA26219

VERIFY ADVISORY:
http://secunia.com/advisories/26219/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

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

DESCRIPTION:
Some vulnerabilities have been reported in IBM AIX, which can be
exploited by malicious, local users to gain escalated privileges.

1) The vulnerability is caused due to the  program loading an
arbitrary library. This can be exploited to load an attacker-supplied
library and execute arbitrary code with root privileges.

2) A boundary error in the "capture" program can be exploited to
cause a stack-based buffer overflow via an overly long, specially
crafted series of control sequences.

Successful exploitation allows execution of arbitrary code with root
privileges.

3) Multiple boundary errors in the "ftp" program can be exploited to
cause stack-based buffer overflows and execute arbitrary code with
root privileges.

4) A boundary error in the "lpd" command can be exploited to cause a
buffer overflow and allow users in the printq group to execute
arbitrary code with root privileges.

5) Insecure file permissions on the "pioinit" script can be exploited
by users in the bin group to execute arbitrary code with root
privileges by replacing the affected script with a malicious one.

6) A boundary error in the "arp" command, which is installed with the
devices.common.IBM.atm.rte fileset, can be exploited to cause a buffer
overflow and execute arbitrary code with root privileges.

The vulnerabilities are reported in versions 5.2.0 and 5.3.0.

SOLUTION:
Apply interim fixes or APARs as soon as they become available:
ftp://aix.software.ibm.com/aix/efixes/security/pioout_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/capture_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/ftpgets_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/lpd_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/pioinit_ifix.tar.Z
ftp://aix.software.ibm.com/aix/efixes/security/atm_ifix.tar.Z

AIX 5.2.0:
APAR IZ01121 (available approximately 10/31/2007)
APAR IZ01134 (available approximately 10/31/2007)
APAR IZ01812 (available approximately 10/31/2007)
APAR IY98560 (available)
APAR IY79785 (available)
APAR IZ00521 (available approximately 10/31/2007)

AIX 5.3.0:
APAR IZ01122 (available approximately 08/08/2007)
APAR IZ01135 (available approximately 11/27/2007)
APAR IZ01813 (available approximately 11/27/2007)
APAR IY98339 (available)
APAR IY79786 (available)
APAR IZ00510 (available approximately 08/08/2007)

PROVIDED AND/OR DISCOVERED BY:
1) Discovered by an anonymous person and reported via iDefense Labs.
2) Discovered by an anonymous person and reported via iDefense Labs.
3) Discovered by an anonymous person and reported via iDefense Labs.
4)-6) Reported by the vendor.

ORIGINAL ADVISORY:
IBM:
ftp://aix.software.ibm.com/aix/efixes/security/README

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=569
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=570
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=571

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