Denial of service in Apache ActiveMQ



| Updated: 2025-05-09
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2025-27533
CWE-ID CWE-400
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 ActiveMQ
Server applications / Mail servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU108769

Risk: Medium

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2025-27533

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources during unmarshalling of OpenWire commands. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ActiveMQ: 5.16.0 - 6.1.5

CPE2.3 External links

https://www.openwall.com/lists/oss-security/2025/05/06/1
https://lists.apache.org/thread/8hcm25vf7mchg4zbbhnlx2lc5bs705hg
https://issues.apache.org/jira/browse/AMQ-6596


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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