Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | apache2 | 2.2.17-2 | — |
| Debian 13 | apache2 | 2.2.17-2 | — |
| Debian 12 | apache2 | 2.2.17-2 | — |
| Debian 6.0 | apache2 | 2.2.16-6+squeeze1 | DSA-2202-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2 | 2.4.23-4.1 | openSUSE-SU-2024:10268-1 |
Advisories 2
- DSA-2202-1 apache2 - failure to drop root privileges Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10268-1 apache2-2.4.23-4.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 46953 vdb-entry
- MDVSA-2011:057 vendor-advisory
- [mpm-itk] 20110321 mpm-itk version 2.2.17-01 released mailing-list
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=618857
- apache-mtmitk-weak-security(66248) vdb-entry
- ADV-2011-0824 vdb-entry
- ADV-2011-0748 vdb-entry
- DSA-2202 vendor-advisory
- ADV-2011-0749 vdb-entry
- [oss-security] 20110321 Re: CVE request: MPM-ITK module for Apache HTTPD mailing-list
- [oss-security] 20110320 CVE request: MPM-ITK module for Apache HTTPD mailing-list
- [mpm-itk] 20110321 CVE 2011-1176: Sometimes runs as root instead of the default Apache user mailing-list