Secunia

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:
Further details available in Customer Area

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.

Changelog
Further details available in Customer Area

Original Advisory
IBM:
ftp://aix.software.ibm.com/aix/efixes/security/README
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01134
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01135
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ02538
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01812
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01813
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01993
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ00521
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ01121

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

Deep Links
Links available in Customer Area