Bugzilla – Bug 1207442
VUL-0: CVE-2022-39958: mod_security_crs: Small range header leading to response rule set bypass
Last modified: 2023-01-24 08:15:07 UTC
rh#2131321 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 undetected access. The legacy CRS versions 3.0.x and 3.1.x are affected, as well as the currently supported versions 3.2.1 and 3.3.2. Integrators and users are advised to upgrade to 3.2.2 and 3.3.3 respectively and to configure a CRS paranoia level of 3 or higher. Reference: https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/ References: https://bugzilla.redhat.com/show_bug.cgi?id=2131321 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-39958 http://www.cvedetails.com/cve/CVE-2022-39958/ https://www.cve.org/CVERecord?id=CVE-2022-39958 https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PD56EAYNGB6E6QQH62LAYCONOP6OH5DZ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YPQ6CCMX3MU4A7MTCGQJA7VMJW3IQDXV/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HL2L2GF7GOCWPMJZDUE5OXDSXHGG3XUJ/