Bug 2364684 (CVE-2025-27533)

Summary:	CVE-2025-27533 ActiveMQ: ActiveMQ: Unvalidated Buffer Size Allocation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	anstephe, asoldano, ataylor, avibelli, bbaranow, bgeorges, bmaxwell, brian.stansberry, cdewolf, chfoley, clement.escoffier, cmiranda, dandread, darran.lofthouse, dbruscin, dkreling, dosoudil, fjuma, gmalinko, gsmet, istudens, ivassile, iweiss, janstey, jmartisk, jscholz, kvanderr, lgao, lthon, manderse, mosmerov, msochure, msvehla, nwallace, olubyans, pcongius, pdelbell, pesilva, pgallagh, pjindal, pmackay, probinso, rguimara, rkieley, rruss, rstancel, rstepani, rsvoboda, sausingh, sbiarozk, smaestri, swoodman, tom.jenkinson, tqvarnst
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in Apache ActiveMQ. This vulnerability allows denial of service by depleting process memory via unmarshalling OpenWire commands without proper size validation when not using mutual TLS connections.	Story Points:	---
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Last Closed:		Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-05-07 10:01:05 UTC

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ.

During unmarshalling of OpenWire commands the size value of buffers was not properly validated which could lead to excessive memory allocation and be exploited to cause a denial of service (DoS) by depleting process memory, thereby affecting applications and services that rely on the availability of the ActiveMQ broker when not using mutual TLS connections.
This issue affects Apache ActiveMQ: from 6.0.0 before 6.1.6, from 5.18.0 before 5.18.7, from 5.17.0 before 5.17.7, before 5.16.8. ActiveMQ 5.19.0 is not affected.

Users are recommended to upgrade to version 6.1.6+, 5.19.0+,  5.18.7+, 5.17.7, or 5.16.8 or which fixes the issue.

Existing users may implement mutual TLS to mitigate the risk on affected brokers.

Comment 3 errata-xmlrpc 2025-10-08 14:48:36 UTC

This issue has been addressed in the following products:

  Red Hat AMQ Broker 7.13.2

Via RHSA-2025:17567 https://access.redhat.com/errata/RHSA-2025:17567