Auth bypass in Owasp Modsecurity Core Rule Set
CVE-2022-39956
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 m…
Vulnerability class: Broken Access Control
EPSS: 0.009 (55.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Owasp Modsecurity Core Rule Set — versions 3.0.x, 3.1.x, unspecified
- Owasp Owasp_modsecurity_core_rule_set
- Debian Debian_linux — versions 10.0
- Fedoraproject Fedora — versions 35, 36, 37
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vulnerability@ncsc.ch (Patch, Vendor Advisory)
- vulnerability@ncsc.ch (vendor-advisory)
- vulnerability@ncsc.ch (vendor-advisory)
- vulnerability@ncsc.ch (vendor-advisory)
- vulnerability@ncsc.ch (mailing-list, Mailing List, Third Party Advisory)
- vulnerability@ncsc.ch (vendor-advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2022-39956?
- CVE-2022-39956 is a high-severity vulnerability in Owasp Modsecurity Core Rule Set, classified under Incorrect Authorization. CVSS score: 7.3/10. Published 2022-09-20.
- How severe is CVE-2022-39956?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2022-39956 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.