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CVE-2022-39957

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CVE-2022-39957

Published: Sep 20, 2022

Modified: Nov 3, 2025

PUBLISHED

CVSS v3.1

7.3

HIGH

Description

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.

VendorProductVersions

OWASP

ModSecurity Core Rule Set

affected
3.0.x
affected
3.1.x
affected
unspecified - <= 3.2.1
affected
unspecified - <= 3.3.2

Weaknesses (CWE)

CWE-693

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

References

FEDORA-2022-90708b46e3
vendor-advisory
FEDORA-2022-85a85c84b3
vendor-advisory
FEDORA-2022-1fd73a5285
vendor-advisory
GLSA-202305-25
vendor-advisory

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