[mod-security-packagers] CVE-2013-5705 - Chunked string case sensitive issue

[Felipe C. <FC...@tr...>]

Hi,

Marin Holst Swende (@mhswende) reported a security issue in ModSecurity related to way that it recognize a chunked transfer encoding.
ModSecurity was just detecting a chunked transfer if it was informed in lower case, apparently Apache is more permissive. The rfc2616 describes the chunk encode.

A fix was made by Breno Silva, and it was distributed altogether with other improvements on 2.7.6. However, the patch to older versions was not available to that list until now, we sorry for that.

The patch is available at:
http://www.modsecurity.org/fix-CVE-2013-570.patch

Signature of the patch:
http://www.modsecurity.org/fix-CVE-2013-570.patch.asc

This patch is suitable to versions 2.7.2 until 2.7.6. If you have a live package that is providing a ModSecurity version older than 2.7.2, please let me know. Just to confirm 2.7.6 and newer don't need the patch.

Thanks,
Felipe "Zimmerle" Costa
Security Researcher, SpiderLabs

Trustwave | SMART SECURITY ON DEMAND
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