CVE-2022-39958 — Incorrect Authorization in Modsecurity Core Rule SET

CWE-863 — Incorrect AuthorizationCWE-116 — Improper Encoding or Escaping of Output5 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.2%
top 56.86%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Owasp Modsecurity Core Rule SETDebian Modsecurity-crsOwasp Modsecurity Core Rule SET+2 more
Timeline
PublishedSep 20
Latest updateSep 21

Description

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedly submitting an HTTP Range header field with a small byte range. A restricted resource, access to which would ordinarily be detected, may be exfiltrated from the backend, despite being protected by a web application firewall that uses CRS. Short subsections of a restricted resource may bypass pattern matching techniques and allow undetecte…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5owasp/modsecurity_core_rule_setunspecified — 3.2.1+2
▶debiandebian/modsecurity-crs< modsecurity-crs 3.3.4-1 (bookworm)

Also affects: Debian Linux 10.0, Fedora 35, 36, 37

Patches

Patch: coreruleset.org ↗Patch: coreruleset.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-3m69-hv34-fc7r: The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by↗2022-09-21
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OSV
CVE-2022-39958: The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by↗2022-09-20
▶

📋Vendor Advisories

2
Red Hat
mod_security_crs: Small range header leading to response rule set bypass↗2022-09-19
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Debian
CVE-2022-39958: modsecurity-crs - The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass ...↗2022
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CVE-2022-39958 — Incorrect Authorization | cvebase