CVE-2022-39955

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Source
https://cve.org/CVERecord?id=CVE-2022-39955
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-39955.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-39955
Downstream
Published
2022-09-20T00:00:00Z
Modified
2026-05-15T11:53:33.921740366Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
Partial rule set bypass in OWASP ModSecurity Core Rule Set by submitting a specially crafted HTTP Content-Type header
Details

The OWASP ModSecurity Core Rule Set (CRS) is affected by a partial rule set bypass by submitting a specially crafted HTTP Content-Type header field that indicates multiple character encoding schemes. A vulnerable back-end can potentially be exploited by declaring multiple Content-Type "charset" names and therefore bypassing the configurable CRS Content-Type header "charset" allow list. An encoded payload can bypass CRS detection this way and may then be decoded by the backend. 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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "last_affected": "3.0.x"
                },
                {
                    "last_affected": "3.1.x"
                },
                {
                    "last_affected": "3.2.1"
                },
                {
                    "last_affected": "3.3.2"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39955.json",
    "cna_assigner": "NCSC.ch"
}
References

Affected packages