CVE catalog
CVE-2022-39958
modsecurity-crs: CVE-2022-39958
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.23% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | modsecurity-crs | sid | 3.3.9-1 | fixed |
| Debian | modsecurity-crs | forky | 3.3.9-1 | fixed |
| Debian | modsecurity-crs | trixie | 3.3.7-1+deb13u2 | fixed |
| Debian | modsecurity-crs | trixie-security | 3.3.7-1+deb13u1 | fixed |
| Debian | modsecurity-crs | bookworm | 3.3.4-1+deb12u3 | fixed |
| Debian | modsecurity-crs | bookworm-security | 3.3.4-1+deb12u1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | modsecurity-crs | source | sid | 3.3.4-1 | not yet assigned | Not reported | [1021137] |
| Debian | modsecurity-crs | source | forky | 3.3.4-1 | not yet assigned | Not reported | [1021137] |
| Debian | modsecurity-crs | source | trixie | 3.3.4-1 | not yet assigned | Not reported | [1021137] |
| Debian | modsecurity-crs | source | bookworm | 3.3.4-1 | not yet assigned | Not reported | [1021137] |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [modsecurity-crs]Unknown
Details (4)
3.3.4-1+deb12u3· all · bookwormFixed · Fixed:
3.3.4-1dsa · modsecurity-crs · debian · bookworm
3.3.4-1+deb12u3· all · bookwormFixed · Fixed:
3.3.4-1dsa · modsecurity-crs · debian · bookworm
3.3.4-1+deb12u1· all · bookworm-securityFixed · Fixed:
3.3.4-1dsa · modsecurity-crs · debian · bookworm
3.3.4-1+deb12u1· all · bookworm-securityFixed · Fixed:
3.3.4-1dsa · modsecurity-crs · debian · bookworm
Observed: