CVE-2019-11391 Denial of service in n/a
Remote attackers can cause denial of service via ReDoS in OWASP ModSecurity Core Rule Set using crafted strings with nested repetition operators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-11391?
CVE-2019-11391 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-933-APPLICATION-ATTACK-PHP.conf allows remote attackers to cause a denial of service (ReDOS) by entering a specially crafted string with $a# at the beginning and nested repetition operators. NOTE: the software maintainer disputes that this is a vulnerability because the issue cannot be exploited via ModSecurity
Weakness: CWE-400
Which versions are affected by CVE-2019-11391?
It affects 1 product.
Products include Modsecurity Owasp Modsecurity Core Rule Set.
How do I fix CVE-2019-11391?
No fix has been published for CVE-2019-11391 yet. Limit exposure of the affected software until one is available.
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-2019-11391 being exploited?
There is no known exploitation of CVE-2019-11391 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2019-11391, GHSA-pvfr-m224-2vm2.