A Denial of Service vulnerability was found in Apache Qpid Broker-J versions 7.0.0-7.0.4 when AMQP protocols 0-8, 0-9 or 0-91 are used to publish messages with size greater than allowed maximum message size limit (100MB by default). The broker crashes due to the defect. AMQP protocols 0-10 and 1.0 are not affected.
Users of Broker-J versions 7.0.0-7.0.4 utilizing AMQP protocols 0-8, 0-9 or 0-91 for message publishing must upgrade to version 7.0.5 or later.
If upgrade of the broker is not possible, the maximum message size limit can be disabled by setting context variable "qpid.max_message_size" to "0" or any negative value. The change can be made either directly in the broker configuration file,
or by using management interfaces (for example, REST API) or by
using JVM option -Dqpid.max_message_size=0. A broker restart is required for the change to take effect.
Alternatively, the support for AMQP protocols 0-8...0-91 can be removed on AMQP ports.
The change can be made either directly in the broker configuration file
or by using management interfaces. An example of REST API call
restricting AMQP port to support only AMQP 1.0 and AMQP 0-10 using curl utility is provided below: