CVE-2019-11391 - Vulnerability Details - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00413.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:modsecurity:owasp_modsecurity_core_rule_set:*:*:*:*:*:*:*:*

No data.

No data.

Project Subscriptions

Vendors	Products
Modsecurity Subscribe	Owasp Modsecurity Core Rule Set Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/1357
https://github.com/SpiderLabs/owasp-modsecurity-crs/issues/1372

History

Sat, 21 Feb 2026 08:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-04-21T01:16:16.000Z

Updated: 2024-08-04T22:55:39.343Z

Reserved: 2019-04-20T00:00:00.000Z

Link: CVE-2019-11391

Vulnrichment

Updated: 2024-08-04T22:55:39.343Z

NVD

Status : Modified

Published: 2019-04-21T02:29:00.487

Modified: 2024-11-21T04:21:00.807

Link: CVE-2019-11391

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-400

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