Secunia

Some vulnerabilities have been reported in IBM DB2, where one has an unknown impact, while others can be exploited by malicious, local users to perform certain actions with escalated privileges or gain escalated privileges.

1) A boundary error within the set-uid root db2dasrrm program can be exploited to cause a stack-based buffer overflow by setting the DASPROF environment variable to a specially crafted, overly long string.

Successful exploitation allows execution of arbitrary code with root privileges.

2) The "dasRecoveryIndex", "dasRecoveryIndex.tmp", ".dasRecoveryIndex.lock", and "dasRecoveryIndex.cor" files are created insecurely when the db2dasrrm program is started. This can be exploited via symlink attacks to overwrite arbitrary files with root privileges.

Successful exploitation requires access to an account that is allowed to start and stop the DB2 Administration Server (e.g. "dasusr1" or the "db2adm1" group).

These vulnerabilities are reported in version 9.1 (Fix Pack 4 and Fix Pack 3) on Linux. Other versions may also be affected.

3) An unspecified error exists related to the DB2FMP process. No further information is currently available.

4) A boundary error can be exploited to cause a buffer overflow in the DAS server process, which allows execution of arbitrary code with escalated privileges.

5) Two vulnerabilities can be exploited to overwrite arbitrary files or to execute arbitrary code on an affected system.

For more information see vulnerabilities #2 and #3 in:
SA29022

Vulnerabilities #3 to #5 are reported in versions prior to 9.5 Fixpak 1.

Solution
Update to the latest versions.
Further details available in Customer Area

Provided and/or discovered by
1) Discovered by an anonymous person and reported via iDefense Labs.
2) Joshua J. Drake, iDefense Labs.

Changelog
Further details available in Customer Area

Original Advisory
IBM (IZ19155):
ftp://ftp.software.ibm.com/ps/products/db2/fixes/english-us/aparlist/db2_v95/APARLIST.TXT
http://www-1.ibm.com/support/docview.wss?uid=swg1IZ12379
http://www-1.ibm.com/support/docview.wss?uid=swg1IZ10776
http://www-1.ibm.com/support/docview.wss?uid=swg1IZ10917
http://www-1.ibm.com/support/docview.wss?uid=swg1IZ07125

iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=689
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=688

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area