CVE-2023-24021

modsecurity: lacking the complete content in FILES_TMP_CONTENT leads to web application firewall bypass

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

Incorrect handling of '\0' bytes in file uploads in ModSecurity before 2.9.7 may allow for Web Application Firewall bypasses and buffer over-reads on the Web Application Firewall when executing rules that read the FILES_TMP_CONTENT collection.

El manejo incorrecto de los bytes '\0' en las cargas de archivos en ModSecurity anteriores a 2.9.7 puede permitir omisiones del Firewall de aplicaciones web y sobrelecturas del búfer en el Firewall de aplicaciones web al ejecutar reglas que leen la colección FILES_TMP_CONTENT.

A vulnerability was found in ModSecurity. This issue occurs when FILES_TMP_CONTENT lacks complete content, which can lead to a Web Application Firewall bypass.

Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products and packaged under Red Hat JBoss Core Services, to allow for faster distribution of updates and for a more consistent update experience. This release of Red Hat JBoss Core Services Apache HTTP Server 2.4.57 serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.51 Service Pack 2, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References. Issues addressed include HTTP response splitting, bypass, integer overflow, out of bounds write, and use-after-free vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Complete

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-01-20 CVE Reserved
2023-01-20 CVE Published
2025-04-02 CVE Updated
2025-04-03 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-170: Improper Null Termination
CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak')

CAPEC

References (9)

URL	Tag	Source
https://github.com/SpiderLabs/ModSecurity/releases/tag/v2.9.7	Release Notes
https://lists.debian.org/debian-lts-announce/2023/01/msg00023.html	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/SpiderLabs/ModSecurity/pull/2857	2023-11-07
https://github.com/SpiderLabs/ModSecurity/pull/2857/commits/4324f0ac59f8225aa44bc5034df60dbeccd1d334	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52TGCZCOHYBDCVWJYNN2PS4QLOHCXWTQ	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYRTXTOQQI6SB2TLI5QXU76DURSLS4XI	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WCH6JM4I4MD4YABYFHSBDDOUFDGIFJKL	2023-11-07
https://access.redhat.com/security/cve/CVE-2023-24021	2023-08-15
https://bugzilla.redhat.com/show_bug.cgi?id=2163615	2023-08-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Trustwave Search vendor "Trustwave"		Modsecurity Search vendor "Trustwave" for product "Modsecurity"				< 2.9.7 Search vendor "Trustwave" for product "Modsecurity" and version " < 2.9.7"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected