CVE-2022-39958
Last modified
CVE-2022-39958 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.93% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Owasp | Owasp Modsecurity Core Rule Set | >= 3.0.0, < 3.2.2 |
| Owasp | Owasp Modsecurity Core Rule Set | >= 3.3.0, < 3.3.3 |
| Fedoraproject | Fedora | 35 |
| Fedoraproject | Fedora | 36 |
| Fedoraproject | Fedora | 37 |
| Debian | Debian Linux | 10.0 |
References
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing List, Third Party Advisory
- https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/01/msg00033.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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