Detections
Analytics

GLSA-202305-25 : OWASP ModSecurity Core Rule Set: Multiple Vulnerabilities

critical Nessus Plugin ID 176193

Language:

Description

The remote host is affected by the vulnerability described in GLSA-202305-25 (OWASP ModSecurity Core Rule Set: Multiple Vulnerabilities)

 - OWASP ModSecurity Core Rule Set 3.1.x before 3.1.2, 3.2.x before 3.2.1, and 3.3.x before 3.3.2 is affected by a Request Body Bypass via a trailing pathname. (CVE-2021-35368)

 - The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass by submitting a specially crafted HTTP Content-Type header field that indicates multiple character encoding schemes. A vulnerable back-end can potentially be exploited by declaring multiple Content-Type charset names and therefore bypassing the configurable CRS Content-Type header charset allow list. An encoded payload can bypass CRS detection this way and may then be decoded by the backend. 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. (CVE-2022-39955)

 - 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).
 (CVE-2022-39956)

 - 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.
 (CVE-2022-39957)

 - The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetected access. 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 and to configure a CRS paranoia level of 3 or higher. (CVE-2022-39958)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

All OWASP ModSecurity Core Rule Set users should upgrade to the latest version:

 # emerge --sync # emerge --ask --oneshot --verbose >=www-apache/modsecurity-crs-3.3.4

See Also

https://security.gentoo.org/glsa/202305-25

https://bugs.gentoo.org/show_bug.cgi?id=822003

https://bugs.gentoo.org/show_bug.cgi?id=872077

Plugin Details

Severity: Critical

ID: 176193

File Name: gentoo_GLSA-202305-25.nasl

Version: 1.0

Type: local

Published: 5/21/2023

Updated: 5/21/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2021-35368

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2022-39956

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:modsecurity-crs, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/21/2023

Vulnerability Publication Date: 11/5/2021

Reference Information

CVE: CVE-2021-35368, CVE-2022-39955, CVE-2022-39956, CVE-2022-39957, CVE-2022-39958