PT-2019-12277 · Owasp+1 · Owasp Modsecurity Core Rule Set+1

0Md3V · Published 2019-04-21 · Updated 2024-08-04 · CVE-2019-11391

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions OWASP ModSecurity Core Rule Set (CRS) versions through 3.1.0

Description An issue was discovered that 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 in the /rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf endpoint.

Recommendations For OWASP ModSecurity Core Rule Set (CRS) versions through 3.1.0, as a temporary workaround, consider restricting access to the /rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf endpoint to minimize the risk of exploitation.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2019-11391

Affected Products

Debian

Owasp Modsecurity Core Rule Set

References · 9

• 🔥 https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/1372 · Exploit
• https://osv.dev/vulnerability/CVE-2019-11391 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-11391 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-11391 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-11391 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-11391 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-11391 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-11391 · Security Note
• https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/1357 · Note