NetSight
IP …
high7.5

CVE-2022-39958

The OWASP ModSecurity Core Rule Set (CRS) is affected by a response body bypass to sequentially exfiltrate small and undetectable sections of data by repeatedl…

Impact

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 products

VendorProductAffected versions
OwaspOwasp Modsecurity Core Rule Set
from 3.0.0 before 3.2.2
from 3.3.0 before 3.3.3
FedoraprojectFedora
Versions 35, 36, 37
DebianDebian Linux
Version 10.0

Weakness classification

CWE-863CWE-116

References