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Date: Sat, 24 Dec 2011 19:37:35 -0500 (EST)
From: David Jorm <>
Subject: CVE Request for Apache ActiveMQ DoS

A flaw in Apache ActiveMQ before 5.6.0 could allow a remote unauthenticated
attacker to abuse the 'failover' feature, allowing them to trigger a denial of
service against the broker service.  An attacker can issue multiple ActiveMQ
openwire connection requests using the string 'failover:tcp://[IP]:61616', and
due to the 'failure' mechanism, all TCP connections remain active even if a
valid session is not created.  After a few thousand requests, a
' Too many open files' exception is triggered, leading
to a freeze or crash of the broker (and possibly connected systems as well).

Upstream bug:

Secunia advisory:

Patch commits:

David Jorm / Red Hat Security Response Team

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