OWASP ModSecurity up to 2.9.8 JSON Content Type excessive platform resource consumption within a loop

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in OWASP ModSecurity up to 2.9.8. This impacts an unknown function of the component JSON Content Type Handler. Performing a manipulation results in excessive platform resource consumption within a loop. This vulnerability is known as CVE-2025-47947. Remote exploitation of the attack is possible. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability, which was classified as critical, was found in OWASP ModSecurity up to 2.9.8. This affects some unknown processing of the component JSON Content Type Handler. The manipulation with an unknown input leads to a excessive platform resource consumption within a loop vulnerability. CWE is classifying the issue as CWE-1050. The product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors. This is going to have an impact on availability. The summary by CVE is:

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-47947 since 05/14/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 237803 (RHEL 8 : mod_security (RHSA-2025:8605)), which helps to determine the existence of the flaw in a target environment.

Applying the patch 3389 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (237803), EUVD (EUVD-2025-16086) and CERT Bund (WID-SEC-2025-1118). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Red Hat JBoss Core Services
  • SUSE openSUSE
  • OWASP ModSecurity

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Excessive platform resource consumption within a loop
CWE: CWE-1050 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 237803
Nessus Name: RHEL 8 : mod_security (RHSA-2025:8605)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 3389

Timelineinfo

05/14/2025 🔍
05/22/2025 +8 days 🔍
05/22/2025 +0 days 🔍
08/17/2025 +87 days 🔍

Sourcesinfo

Advisory: GHSA-859r-vvv8-rm8r
Status: Confirmed

CVE: CVE-2025-47947 (🔍)
GCVE (CVE): GCVE-0-2025-47947
GCVE (VulDB): GCVE-100-309945
EUVD: 🔍
CERT Bund: WID-SEC-2025-1118 - OWASP ModSecurity: Schwachstelle ermöglicht Denial of Service

scip Labs: https://www.scip.ch/en/?labs.20130913

Entryinfo

Created: 05/22/2025 06:39
Updated: 08/17/2025 16:18
Changes: 05/22/2025 06:39 (65), 05/22/2025 13:04 (1), 05/24/2025 03:31 (1), 06/06/2025 04:31 (2), 08/17/2025 16:18 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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