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Vulnerability of IBM MQ: privilege escalation via session fixation

Synthesis of the vulnerability 

An attacker can define his session in IBM MQ, in order to get another user's privileges.
Impacted systems: WebSphere MQ.
Severity of this alert: 2/4.
Creation date: 26/09/2019.
Références of this alert: 886899, CVE-2019-4227, VIGILANCE-VUL-30419.

Description of the vulnerability 

An attacker can define his session in IBM MQ, in order to get another user's privileges.
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This computer weakness announce impacts software or systems such as WebSphere MQ.

Our Vigil@nce team determined that the severity of this security alert is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this vulnerability.

Solutions for this threat 

IBM MQ: patch for session.
A patch is available:
  Fixpack 8.0.013: https://www.ibm.com/support/pages/node/1073376
  Fixpack 9.0.0.7: https://www-01.ibm.com/support/docview.wss?uid=ibm10887223
  Fixpack 9.1.0.3: https://www-01.ibm.com/support/docview.wss?uid=ibm10961534
  IBM MQ 9.1.3 CD: https://www-01.ibm.com/support/docview.wss?uid=swg24043697
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