ModSecurity < 2.1.1 POST Data Null Byte Filter Bypass
Medium Nessus Plugin ID 67124
SynopsisThe remote web application firewall may be affected by a security bypass vulnerability.
DescriptionAccording to its banner, the version of ModSecurity installed on the remote host is earlier than 2.1.1. It is, therefore, potentially affected by a security bypass vulnerability. An error exists related to HTTP POST requests and 'application/x-www-form-urlencoded' content containing un-encoded NULL bytes that could allow a remote attacker to bypass certain filters and carry out attacks.
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 2.1.1 or later.