Vulnerability 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 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Owasp | Owasp Modsecurity Core Rule Set | >= 3.0.0, < 3.2.2 |
| Fedoraproject | Fedora | 35 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cvPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202305-25
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cvPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/08/msg00004.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202305-25
FAQ
What is CVE-2022-39958?
CVE-2022-39958 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 w...
How severe is CVE-2022-39958?
CVE-2022-39958 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-39958?
Check the references section above for vendor advisories and patch information. Affected products include: Owasp Owasp Modsecurity Core Rule Set, Fedoraproject Fedora, Debian Debian Linux.