ModSecurity Detection Bypass and Denial of Service Vulnerabilities

Secunia ID	SA38460
Release Date	09 Feb 2010
Criticality	Moderately Critical
Solution Status	Vendor Patch
Software	ModSecurity 2.x
Where	From remote
Impact	DoS (Denial of Service) This includes vulnerabilities ranging from excessive resource consumption (e.g. causing a system to use a lot of memory) to crashing an application or an entire system. Security Bypass This covers vulnerabilities or security issues where malicious users or people can bypass certain security mechanisms of the application. The actual impact varies significantly depending on the design and purpose of the affected application.
Description	Some vulnerabilities have been reported in ModSecurity, which can be exploited by malicious people to bypass certain security restrictions and cause a DoS (Denial of Service). The vulnerabilities are caused due to unspecified errors, which can be exploited to bypass certain detection mechanisms and cause a DoS. The vulnerabilities are reported in versions prior to 2.5.12.
Solution	Update to version 2.5.12.
Reported by	The vendor credits the Sogeti/ESEC R&D team.
Original Advisory	http://freshmeat.net/projects/modsecurity/releases/312017 http://sourceforge.net/projects/mod-security/files/modsecurity-apache/2.5.12/CHANGES_2.5.12.txt/download