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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2011-4905
• https://issues.apache.org/jira/browse/AMQ-3294
• http://openwall.com/lists/oss-security/2011/12/25/2
• http://openwall.com/lists/oss-security/2011/12/25/6
• http://svn.apache.org/viewvc?view=revision&revision=1209700
• http://svn.apache.org/viewvc?view=revision&revision=1211844
• apache/activemq@3a71f8e
• apache/activemq@9df9d3e
• apache/activemq@da7f996
• https://issues.apache.org/jira/browse/AMQ-1928