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)

Security Bulletin

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 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

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

18th July 2018 - Republish

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Tips

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)