PT-2023-26332 · Owasp+1 · Coreruleset+1

Published 2023-07-13 · Updated 2026-02-22 · CVE-2023-38199

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions coreruleset (aka OWASP ModSecurity Core Rule Set) versions 3.3.4 and earlier

Description The issue allows attackers to potentially bypass a Web Application Firewall (WAF) using a crafted payload, exploiting "Content-Type confusion" between the WAF and the backend application. This happens when the web application relies solely on the last Content-Type header. Different platforms may handle additional Content-Type headers in various ways, such as rejecting them or merging conflicting headers, which could lead to detection as a malformed header.

Recommendations For coreruleset (aka OWASP ModSecurity Core Rule Set) versions 3.3.4 and earlier, consider updating to a version that addresses this issue, as no specific workaround is provided for these versions. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2023-38199

OPENSUSE-SU-2024:13187-1

Affected Products

Debian

Coreruleset

References · 11

• https://github.com/coreruleset/coreruleset/issues/3191 · Patch
• https://security-tracker.debian.org/tracker/CVE-2023-38199 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-38199 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-38199 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-38199 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-38199 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-38199 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-38199 · Security Note
• https://github.com/coreruleset/coreruleset/pull/3237 · Note
• https://twitter.com/Cezar_H_Linux/status/2025603884345905435 · Twitter Post
• https://t.me/cibsecurity/66617 · Telegram Post