Incorrect Authorization Affecting mod_security_crs package, versions *


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.08% (25th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Incorrect Authorization vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-RHEL8-MODSECURITYCRS-3038066
  • published1 Oct 2022
  • disclosed19 Sept 2022

Introduced: 19 Sep 2022

CVE-2022-39956  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 mod_security_crs.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mod_security_crs package and not the mod_security_crs package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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).

CVSS Base Scores

version 3.1