Vulnerability Details CVE-2022-39956
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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.5%
CVSS Severity
CVSS v3 Score 7.3
References
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HL2L2GF7GOCWPMJZDUE5OXDSXHGG3XUJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PD56EAYNGB6E6QQH62LAYCONOP6OH5DZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPQ6CCMX3MU4A7MTCGQJA7VMJW3IQDXV/
- https://security.gentoo.org/glsa/202305-25
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HL2L2GF7GOCWPMJZDUE5OXDSXHGG3XUJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PD56EAYNGB6E6QQH62LAYCONOP6OH5DZ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YPQ6CCMX3MU4A7MTCGQJA7VMJW3IQDXV/
- https://security.gentoo.org/glsa/202305-25
Products affected by CVE-2022-39956
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.0.0
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.0.1
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.0.2
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.1.0
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.1.1
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.1.2
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.2.0
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.2.1
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.3.0
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.3.1
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cpe:2.3:a:owasp:owasp_modsecurity_core_rule_set:3.3.2
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cpe:2.3:o:debian:debian_linux:10.0
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cpe:2.3:o:fedoraproject:fedora:35
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cpe:2.3:o:fedoraproject:fedora:36
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cpe:2.3:o:fedoraproject:fedora:37