The configuration merger in itk.c in the Steinar H. Gunderson mpm-itk Multi-Processing Module 2.2.11-01 and 2.2.11-02 for the Apache HTTP Server does not properly handle certain configuration sections that specify NiceValue but not AssignUserID, which might allow remote attackers to gain privileges by leveraging the root uid and root gid of an mpm-itk process.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=618857
lists.err.no/pipermail/mpm-itk/2011-March/000393.html
lists.err.no/pipermail/mpm-itk/2011-March/000394.html
openwall.com/lists/oss-security/2011/03/20/1
openwall.com/lists/oss-security/2011/03/21/13
www.debian.org/security/2011/dsa-2202
www.mandriva.com/security/advisories?name=MDVSA-2011:057
www.securityfocus.com/bid/46953
www.vupen.com/english/advisories/2011/0748
www.vupen.com/english/advisories/2011/0749
www.vupen.com/english/advisories/2011/0824
exchange.xforce.ibmcloud.com/vulnerabilities/66248