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high7.3

CVE-2022-39957

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass.

Impact

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.

Affected products

VendorProductAffected versions
OwaspOwasp Modsecurity Core Rule Set
from 3.0.0 before 3.2.2
from 3.3.0 before 3.3.3
FedoraprojectFedora
Versions 35, 36, 37
DebianDebian Linux
Version 10.0

Weakness classification

CWE-693CWE-116

References