CVE-2023-5379

Published: Dec 12, 2023

Modified: Feb 25, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request without receiving an AJP response, and stops forwarding. This issue could allow a malicious user could to repeatedly send requests that exceed the max-header-size, causing a Denial of Service (DoS).

Vendor	Product	Versions
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:3.0.1-4.b08_redhat_00005.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:5.1.17-3.Final_redhat_00004.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:2.8.11.6-3.SP1_redhat_00003.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:4.0.12-1.Final_redhat_00002.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:4.1.63-2.Final_redhat_00003.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.4.18-16.SP14_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:7.1.11-4.GA_redhat_00002.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.1.14-1.Final_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.0.21-1.Final_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.0.13-1.Final_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.0.12-1.Final_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	unaffected `0:1.0.12-6.Final_redhat_00001.1.ep7.el7 - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-3.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-3.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-5.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-3.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-5.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.10.4-2.redhat_00006.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:1.7.2-16.Final_redhat_00017.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:4.1.63-5.Final_redhat_00003.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:2.0.41-4.SP5_redhat_00001.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:7.3.14-3.GA_redhat_00002.1.el7eap - < *`
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	unaffected `0:1.10.17-1.Final_redhat_00001.1.el7eap - < *`
Red Hat	Red Hat build of Quarkus	All versions
Red Hat	Red Hat Data Grid 8	All versions
Red Hat	Red Hat Decision Manager 7	All versions
Red Hat	Red Hat Fuse 7	All versions
Red Hat	Red Hat JBoss Data Grid 7	All versions
Red Hat	Red Hat JBoss Enterprise Application Platform 7	All versions
Red Hat	Red Hat JBoss Fuse 6	All versions
Red Hat	Red Hat Process Automation 7	All versions
Red Hat	Red Hat Single Sign-On 7	All versions
Red Hat	Red Hat support for Spring Boot	All versions

Weaknesses (CWE)

CWE-770

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

References

RHSA-2025:9582

vendor-advisory

x_refsource_REDHAT

RHSA-2025:9583

vendor-advisory

x_refsource_REDHAT

https://access.redhat.com/security/cve/CVE-2023-5379

vdb-entry

x_refsource_REDHAT

RHBZ#2242099

issue-tracking

x_refsource_REDHAT

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CVE-2023-5379

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References