VDB-133928 · CVE-2019-11387 · ID 1359

OWASP ModSecurity Core Rule Set up to up to 3.1.0 REQUEST-942-APPLICATION-ATTACK-SQLI.conf incorrect regex

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in OWASP ModSecurity Core Rule Set up to up to 3.1.0 and classified as critical. This vulnerability affects unknown code of the file /rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf. Such manipulation leads to incorrect regex. This vulnerability is listed as CVE-2019-11387. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in OWASP ModSecurity Core Rule Set up to up to 3.1.0. It has been rated as critical. Affected by this issue is an unknown code of the file /rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf. The manipulation with an unknown input leads to a incorrect regex vulnerability. Using CWE to declare the problem leads to CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. Impacted is availability. CVE summarizes:

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.

The bug was discovered 04/15/2019. The weakness was presented 04/21/2019. This vulnerability is handled as CVE-2019-11387 since 04/20/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 6 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 253548 (Linux Distros Unpatched Vulnerability : CVE-2019-11387), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (253548). See VDB-133932, VDB-133931, VDB-133930 and VDB-133929 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

OWASP

Name

ModSecurity Core Rule Set

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 253548
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2019-11387

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/15/2019 🔍
04/20/2019 +5 days 🔍
04/21/2019 +1 days 🔍
04/23/2019 +2 days 🔍
08/23/2025 +2314 days 🔍

Sourcesinfo

Status: Not defined
Confirmation: 🔍

CVE: CVE-2019-11387 (🔍)
GCVE (CVE): GCVE-0-2019-11387
GCVE (VulDB): GCVE-100-133928
scip Labs: https://www.scip.ch/en/?labs.20130913
See also: 🔍

Entryinfo

Created: 04/23/2019 08:45
Updated: 08/23/2025 23:03
Changes: 04/23/2019 08:45 (54), 06/01/2020 09:41 (2), 09/06/2023 10:38 (3), 08/23/2025 23:03 (17)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.