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Vulnerabilities / CVE-2022-39956

critical

CVE-2022-39956

mod_security_crs: Content-Type or Content-Transfer-Encoding MIME header fields abuse

Published Modified CWE 863, 116
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Red Hat (medium).

Description

The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass for HTTP multipart requests by submitting a payload that uses a character encoding scheme via the Content-Type or the deprecated Content-Transfer-Encoding multipart MIME header fields that will not be decoded and inspected by the web application firewall engine and the rule set. The multipart payload will therefore bypass detection. A vulnerable backend that supports these encoding schemes can potentially be exploited. 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 upgrade to 3.2.2 and 3.3.3 respectively. The mitigation against these vulnerabilities depends on the installation of the latest ModSecurity version (v2.9.6 / v3.0.8).

Affected packages and fixed versions

SourcePackageFixed in
debian 10modsecurity-crs3.2.3-0+deb10u3
debian 11modsecurity-crs3.3.4-1~deb11u1
debian 12modsecurity-crs3.3.4-1
debian 13modsecurity-crs3.3.4-1
debian 14modsecurity-crs3.3.4-1
echomodsecurity-crs3.3.4-1
rapidfort alma 8mod_security_crsno fix listed
rapidfort alma 9mod_security_crsno fix listed
rapidfort Red Hat 9mod_security_crsno fix listed
Red Hatmod_security_crsno fix listed

References

All 11 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.