ModSecurity < 2.7.6 Chunked Header Filter Bypass
Medium Nessus Plugin ID 73962
SynopsisThe remote web application firewall may be affected by a filter bypass vulnerability.
DescriptionAccording to its banner, the version of ModSecurity installed on the remote host is prior to 2.7.6. It is, therefore, potentially affected by a filter bypass vulnerability.
A filter bypass vulnerability exists with 'modsecurity.c' not properly handling chunked requests. A remote attacker, with a specially crafted request, can bypass security filters and inject arbitrary content.
Note that Nessus has not tested for this issue but has instead relied only on the version in the server's banner.
SolutionUpgrade to ModSecurity version 2.7.6 or later.