IBM WebSphere MQ 6.0 before 6.0.2.9 and 7.0 before 7.0.1.1 does not encrypt the username and password in the security parameters field, which allows remote attackers to obtain sensitive information by sniffing the network traffic from a .NET client application.

IBM WebSphere MQ 6.x before 6.0.2.10 and 7.x before 7.0.1.3 allows remote attackers to spoof X.509 certificate authentication, and send or receive channel messages, via a crafted Subject Distinguished Name (DN) value in a certificate.

IBM WebSphere MQ 6.0 before 6.0.2.11 and 7.0 before 7.0.1.5 does not use the CRL Distribution Points (CDP) certificate extension, which might allow man-in-the-middle attackers to spoof an SSL partner via a revoked certificate for a (1) client, (2) queue manager, or (3) application.

Heap-based buffer overflow in IBM WebSphere MQ 6.0 before 6.0.2.11 and 7.0 before 7.0.1.5 allows remote authenticated users to execute arbitrary code or cause a denial of service (queue manager crash) by inserting an invalid message into the queue.