CVE-2022-39958

Summary

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.

Affected Software

VendorProductVersion RangeStatus
OWASPModSecurity Core Rule Set3.0.xaffected
OWASPModSecurity Core Rule Set3.1.xaffected
OWASPModSecurity Core Rule Setunspecified <= 3.2.1affected
OWASPModSecurity Core Rule Setunspecified <= 3.3.2affected

Weaknesses

  • CWE-863: CWE-863 Incorrect Authorization

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References