Debian Security Advisory

DSA-2991-1 modsecurity-apache -- security update

Date Reported:
27 Jul 2014
Affected Packages:
modsecurity-apache
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2013-5705.
More information:

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.

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.