SB2019072816 - Denial of service in OWASP ModSecurity Core Rule Set (CRS)
Published: July 28, 2019 Updated: February 9, 2023
Security Bulletin ID
SB2019072816
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Incorrect Regular Expression (CVE-ID: CVE-2019-11387)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect ruleset in /rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf. A remote attacker can pass a specially crafted string with nested repetition operators and perform regular expression denial of service (ReDos) attack.
Remediation
Install update from vendor's website.