ModSecurity up to 2.9.6 Web Application Firewall access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in ModSecurity up to 2.9.6 and classified as critical. This vulnerability affects unknown code of the component Web Application Firewall. The manipulation results in access control. This vulnerability is known as CVE-2023-24021. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in ModSecurity up to 2.9.6. Affected is an unknown code of the component Web Application Firewall. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In ModSecurity before 2.9.7, FILES_TMP_CONTENT sometimes lacked the complete content. This can lead to a Web Application Firewall bypass.

The weakness was published 01/21/2023. The advisory is available at github.com. This vulnerability is traded as CVE-2023-24021 since 01/20/2023. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 239776 (TencentOS Server 4: mod_security (TSSA-2024:0265)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.9.7 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (239776). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
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: 239776
Nessus Name: TencentOS Server 4: mod_security (TSSA-2024:0265)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ModSecurity 2.9.7
Patch: github.com

Timelineinfo

01/20/2023 🔍
01/21/2023 +1 days 🔍
01/21/2023 +0 days 🔍
06/20/2025 +881 days 🔍

Sourcesinfo

Advisory: DLA 3283-1
Status: Confirmed

CVE: CVE-2023-24021 (🔍)
GCVE (CVE): GCVE-0-2023-24021
GCVE (VulDB): GCVE-100-219090
scip Labs: https://www.scip.ch/en/?labs.20130913

Entryinfo

Created: 01/21/2023 09:23
Updated: 06/20/2025 11:13
Changes: 01/21/2023 09:23 (41), 02/18/2023 08:07 (1), 04/02/2025 21:00 (27), 06/20/2025 11:13 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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