CVE-2025-27533

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/8hcm25vf7mchg4zbbhnlx2lc5bs705hg	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/05/06/1	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:activemq::::::::
	cpe:2.3:a:apache:activemq::::::::
	cpe:2.3:a:apache:activemq::::::::
	cpe:2.3:a:apache:activemq::::::::

History

16 Jul 2025, 14:45

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-05-07 09:15

Updated : 2025-07-18 14:50

NVD link : CVE-2025-27533

Mitre link : CVE-2025-27533

CVE.ORG link : CVE-2025-27533

JSON object : View

Products Affected

apache

activemq

CWE

CWE-789

Memory Allocation with Excessive Size Value

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ActiveMQ 5.19.0 no se ve afectado. Se recomienda a los usuarios actualizar a la versi\u00f3n 6.1.6+, 5.19.0+, 5.18.7+, 5.17.7 o 5.16.8, o a la que solucione el problema. Los usuarios existentes pueden implementar TLS mutuo para mitigar el riesgo en los corredores afectados."}], "lastModified": "2025-07-18T14:50:06.900", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "444A1568-2609-4BB7-BCD1-EC0294AF60B6", "versionEndExcluding": "5.16.8", "versionStartIncluding": "5.16.0"}, {"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "61248BE9-38C2-4FB9-BAE6-7ECF600E93BA", "versionEndExcluding": "5.17.7", "versionStartIncluding": "5.17.0"}, {"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EB864869-AB2D-44BF-ADE4-7381D5F52D0B", "versionEndExcluding": "5.18.7", "versionStartIncluding": "5.18.0"}, {"criteria": "cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AF31F5B0-D737-4EC2-BF00-CC8C44AF7BB0", "versionEndExcluding": "6.1.6", "versionStartIncluding": "6.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}