CVE-2023-38199

CRITICAL EPSS 45.7%
Published Jul 13, 20232y ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jul 13, 2023 2y ago
Last Modified Jun 17, 2026 1w ago

Description

coreruleset (aka OWASP ModSecurity Core Rule Set) through 3.3.4 does not detect multiple Content-Type request headers on some platforms. This might allow attackers to bypass a WAF with a crafted payload, aka "Content-Type confusion" between the WAF and the backend application. This occurs when the web application relies on only the last Content-Type header. Other platforms may reject the additional Content-Type header or merge conflicting headers, leading to detection as a malformed header.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
45.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-843

Affected Products 1

VendorProductVersionRange
owaspcoreruleset* ≤3.3.4

References 2

  • github.com https://github.com/coreruleset/coreruleset/issues/3191
    Issue TrackingPatch
  • github.com https://github.com/coreruleset/coreruleset/pull/3237
    Issue Tracking

Remediation

  • github.com https://github.com/coreruleset/coreruleset/issues/3191
    Issue TrackingPatch