Main Vulnerability Database Vulnerabilities #VU72099

Input validation error in OWASP ModSecurity Core Rule Set (CRS) - CVE-2019-13464

Published: February 9, 2023

Vulnerability identifier: #VU72099

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-13464

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass filtration rules.

The vulnerability exists due to an error when using X.Filename instead of X_Filename in some PHP Script Uploads rules, because PHP automatically transforms dots into underscores in certain contexts where dots are invalid. A remote attacker can bypass implemented rules and successfully upload dangerous files on the server.

Affected software

OWASP ModSecurity Core Rule Set (CRS)

How to mitigate CVE-2019-13464

Install updates from vendor's website.

OWASP ModSecurity Core Rule Set (CRS) - update to 3.2.0

External References

Related Security Bulletins