Vulnerability in Owasp Coreruleset
CVE-2023-38199
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.
EPSS: 0.008 (51.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Owasp Coreruleset
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Issue Tracking)
- cve@mitre.org (Issue Tracking)
Frequently asked questions
- What is CVE-2023-38199?
- CVE-2023-38199 is a critical-severity vulnerability in Owasp Coreruleset, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.8/10. Published 2023-07-13.
- How severe is CVE-2023-38199?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-38199 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.