Description
ModSecurity before 2.5.11 treats request parameter values containing single quotes as files, which allows remote attackers to bypass filtering rules and perform other attacks such as cross-site scripting (XSS) attacks via a single quote in a request parameter in the Content-Disposition field of a request with a multipart/form-data Content-Type header.
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.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | apache2-mod_security2 | 2.9.0-5.6 | openSUSE-SU-2024:10034-1 |
Advisories 1
- openSUSE-SU-2024:10034-1 apache2-mod_security2-2.9.0-5.6 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- openSUSE-SU-2013:1342 vendor-advisory
- 54156 vdb-entry
- openSUSE-SU-2013:1331 vendor-advisory
- http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf
- http://mod-security.svn.sourceforge.net/viewvc/mod-security/m2/branches/2.6.x/CHANGES
- http://blog.ivanristic.com/2012/06/modsecurity-and-modsecurity-core-rule-set-multipart-bypasses.html
- [oss-security] 20120621 Re: mod_security CVE request mailing-list
- [oss-security] 20120621 mod_security CVE request mailing-list
- 49576 third-party-advisory
- https://www.modsecurity.org/fisheye/browse/modsecurity/m2/branches/2.5.x/apache2/msc_multipart.c?r2=1419&r1=1366
- openSUSE-SU-2013:1336 vendor-advisory