CVE-2023-5379

Undertow: ajp request closes connection exceeding maxrequestsize

State: Published
Severity: 7.5 High
Published: Dec 12, 2023
Updated: Aug 4, 2026
Reserved: Oct 4, 2023

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).

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	redhat

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

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

References

RHSA-2025:9582vendor-advisory
RHSA-2025:9583vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-5379vdb-entry
RHBZ#2242099issue-tracking
RHSA-2023:4509vendor-advisory

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