Security Bulletin: Malformed message headers could cause message transmission to be blocked through channels resulting in denial of service in IBM MQ(CVE-2018-1503)

Summary

IBM MQ RCVR or CLUSRCVR type channels could go into retry status after receiving messages containing invalid or malformed headers. This results in blocking of further transmission of messages.

Vulnerability Details

CVEID: CVE-2018-1503 DESCRIPTION: IBM MQ could allow a remotely authenticated attacker to send invalid or malformed headers that could cause messages to no longer be transmitted via the affected channel.
CVSS Base Score: 4.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/141339&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM WebSphere MQ v7.5.0.0 to 7.5.0.8

IBM WebSphere MQ v8.0.0.0 to 8.0.0.9

IBM MQ 9.0.0.0 to 9.0.0.3

Remediation/Fixes

IBM WebSphere MQ v7.5.0.0 to 7.5.0.8

Contact IBM Support to request an interim fix for IT24235

IBM WebSphere MQ v8.0.0.0 to 8.0.0.9

Apply fix pack 8.0.0.10

IBM MQ 9.0.0.0 to 9.0.0.3

Apply fix pack 9.0.0.4