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Fencer Intel
medium 5.0

CVE-2011-4905 json

Denial of Service in Apache ActiveMQ

published 2012-01-05 14 y ago modified 2026-06-16 4 mo ago also GHSA-9wcx-326r-7j7w , EUVD-2022-3455

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.5%
EPSS 8.5% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

Apache ActiveMQ before 5.6.0 allows remote attackers to cause a denial of service (file-descriptor exhaustion and broker crash or hang) by sending many openwire failover:tcp:// connection requests.

Patch / fix

  • maven org.apache.activemq:activemq-core 5.6.0
  • activemq Debian 13, Debian 12 5.5.0+dfsg-5

debian advisories DEBIAN-CVE-2011-4905

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-4905 updated cvss 5.0

ActiveMQ: flaw within failover mechanism when handling openwire requests can lead to DoS

  • Red Hat JBoss BRMS 5 unspecified unspecified
    under investigation

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

8.51% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • issues.apache.org https://issues.apache.org/jira/browse/AMQ-3294 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected packages

ecosystem package affected fixed in
maven org.apache.activemq:activemq-core
<5.6.0
5.6.0

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.