mod_security: denial of service

From the Red Hat Bugzilla entry:

Fixed Remote Null Pointer DeReference (CVE-2013-2765). When forceRequestBodyVariable action is triggered and a unknown Content-Type is used, mod_security will crash trying to manipulate msr->msc_reqbody_chunks->elts however msr->msc_reqbody_chunks is NULL. (Thanks Younes JAAIDI)