modsecurity-crs: The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass
CVE-2022-39957 is fixed in modsecurity-crs on 1 platform, first by DEBIAN-CVE-2022-39957, released September 20, 2022. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| modsecurity-crs · Debian 12.15 (bookworm) | 3.3.4-1 | DEBIAN-CVE-2022-39957 | Sep 20, 2022 |
| modsecurity-crs · Debian 13.5 (trixie) | 3.3.4-1 | DEBIAN-CVE-2022-39957 | Sep 20, 2022 |
| modsecurity-crs · Debian 14 | 3.3.4-1 | DEBIAN-CVE-2022-39957 | Sep 20, 2022 |
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