CVE-2019-11387 Denial of service in n/a

Medium 5.3 Published 21 Apr 2019 Updated 4 Aug 2024

Remote attackers can cause a denial of service in OWASP ModSecurity Core Rule Set via specially crafted strings triggering ReDoS.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2019-11387?

CVE-2019-11387 is a medium-severity denial of service vulnerability in n/a, published on 21 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in OWASP ModSecurity Core Rule Set (CRS) through 3.1.0. /rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf allows remote attackers to cause a denial of service (ReDOS) by entering a specially crafted string with nested repetition operators.

Weakness: CWE-400

Which versions are affected by CVE-2019-11387?

It affects 1 product.

Products include Modsecurity Owasp Modsecurity Core Rule Set.

How do I fix CVE-2019-11387?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-11387 being exploited?

There is no known exploitation of CVE-2019-11387 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2019-11387, GHSA-473r-xgj8-7xqq, UBUNTU-CVE-2019-11387.