CVE-2023-5379

Undertow: ajp request closes connection exceeding maxrequestsize

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).

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.13%
Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat JBoss Enterprise Application Platform 7
Affected: Red Hat Red Hat build of Quarkus
Affected: Red Hat Red Hat Data Grid 8
Affected: Red Hat Red Hat Decision Manager 7
Affected: Red Hat Red Hat Fuse 7
Affected: Red Hat Red Hat JBoss Data Grid 7
Affected: Red Hat Red Hat JBoss Enterprise Application Platform 7
Affected: Red Hat Red Hat JBoss Fuse 6
Affected: Red Hat Red Hat Process Automation 7
Affected: Red Hat Red Hat Single Sign-On 7
Affected: Red Hat Red Hat support for Spring Boot
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2023:4509 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-5379 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2242099 issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-5379?
CVE-2023-5379 has been scored as a high severity vulnerability.
How to fix CVE-2023-5379?
To fix CVE-2023-5379, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-5379 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5379 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5379?
CVE-2023-5379 affects Red Hat Red Hat JBoss Enterprise Application Platform 7, Red Hat Red Hat build of Quarkus, Red Hat Red Hat Data Grid 8, Red Hat Red Hat Decision Manager 7, Red Hat Red Hat Fuse 7, Red Hat Red Hat JBoss Data Grid 7, Red Hat Red Hat JBoss Enterprise Application Platform 7, Red Hat Red Hat JBoss Fuse 6, Red Hat Red Hat Process Automation 7, Red Hat Red Hat Single Sign-On 7, Red Hat Red Hat support for Spring Boot.
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