CVE-2019-11391 describes a Regular Expression Denial of Service (ReDOS) vulnerability in OWASP ModSecurity Core Rule Set (CRS) through version 3.1.0, specifically within the /rules/REQUEST-933-APPLICATION-ATTACK-PHP.conf file. This flaw allows remote attackers to cause a denial of service by submitting a specially crafted string. The vulnerability is rated Medium severity (CVSS 5.3) due to its network-based attack vector and low attack complexity, though it only impacts availability. Despite the potential for denial of service, the software maintainer disputes its exploitability via ModSecurity, and there is no evidence of active exploitation, public exploit code, or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.1.0CPE matchmatch criteria | cpe:2.3:a:modsecurity:owasp_modsecurity_core_rule_set:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.