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Debian Security Advisory DSA 2991-1 (modsecurity-apache - security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Martin Holst Swende discovered a flaw in the way chunked requests are handled in ModSecurity, an Apache module whose purpose is to tighten the Web application security. A remote attacker could use this flaw to bypass intended mod_security restrictions by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header, allowing to send requests containing content that should have been removed by mod_security.
Affected Software
Affected Software
modsecurity-apache on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For the stable distribution (wheezy), this problem has been fixed in version 2.6.6-6+deb7u2. For the testing distribution (jessie), this problem has been fixed in version 2.7.7-1. For the unstable distribution (sid), this problem has been fixed in version 2.7.7-1. We recommend that you upgrade your modsecurity-apache packages.