Content-Type Confusion Vulnerability in OWASP ModSecurity Core Rule Set
CVE-2023-38199

9.8CRITICAL

Key Information:

Vendor

Owasp

Status
Coreruleset
Vendor
CVE Published:
13 July 2023

What is CVE-2023-38199?

The OWASP ModSecurity Core Rule Set prior to version 3.3.4 is susceptible to a vulnerability that allows multiple Content-Type request headers to go undetected on specific platforms. This oversight can enable attackers to bypass Web Application Firewalls (WAFs) by exploiting the 'Content-Type confusion' between the WAF and the backend application. The issue arises when the web application considers only the last Content-Type header, whereas other platforms might reject or merge additional conflicting headers, leading to detection failures. This vulnerability poses significant risks for web applications relying on proper header validation to ensure security.

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References

https://github.com/coreruleset/coreruleset/issues/3191
https://github.com/coreruleset/coreruleset/pull/3237

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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