Riskcovery

CVE-2025-27533

Apache ActiveMQ: Unchecked buffer length can cause excessive memory allocation

State
Published
Severity
6.9 Medium
Published
May 7, 2025
Updated
Nov 3, 2025
Reserved
Feb 28, 2025

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
4.06.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/AU:Y/R:A/V:D/RE:M/U:Redapache

Weaknesses

  • CWE-789 Memory Allocation with Excessive Size Value

Affected Products

ProductVersions
Apache ActiveMQApache Software Foundation
  • 6.0.0 to before 6.1.6Affected
  • 5.18.0 to before 5.18.7Affected
  • 5.17.0 to before 5.17.7Affected
  • 5.16.0 to before 5.16.8Affected

References

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