CVE-2022-39957: fallo de gravedad alta en OWASP ModSecurity Core Rule Set
Response body bypass in OWASP ModSecurity Core Rule Set via a specialy crafted charset in the HTTP Accept header
Publicada el · Actualizada el
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.3epss 1.0%
probabilidad de explotación
1.0%top 38% de las CVE
explotación observada
noninguna fuente lo reporta
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Productos afectados
OWASP · ModSecurity Core Rule SetCVEs relacionadas — OWASP ModSecurity Core Rule Set
En el mismo producto, de las más peligrosas a las menos.
CVE-2022-39955HIGHPartial rule set bypass in OWASP ModSecurity Core Rule Set by submitting a specially crafted HTTP Content-Type headerEPSS 1.4%CVE-2022-39958HIGHResponse body bypass in OWASP ModSecurity Core Rule Set via repeated HTTP Range header submission with a small byte rangeEPSS 1.2%CVE-2022-39956HIGHPartial rule set bypass in OWASP ModSecurity Core Rule Set for HTTP multipart requests using character encoding in the Content-Type or Content-Transfer-Encoding headerEPSS 1.2%
Referencias
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.htmlhttps://lists.debian.org/debian-lts-announce/2025/08/msg00004.htmlhttps://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