Lack of data validation In modsecurity-crs
Description
The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass. A client can issue an HTTP Accept header field containing an optional "charset" parameter in order to receive the response in an encoded form. Depending on the "charset", this response can not be decoded by the web application firewall. A restricted resource, access to which would ordinarily be detected, may therefore bypass detection. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Package | Affected version | Patched versions |
|---|---|---|---|
 debian 11 | 3.3.4-1~deb11u1 | ||
debian 12 | 3.3.4-1 | ||
debian 13 | 3.3.4-1 | ||
debian 14 | 3.3.4-1 | ||
 rpm rhel7 | - | - | |
rpm rhel8 | - | - | |
rpm rhel9 | - | - |
Aliases