Security Bulletin: IBM MQ termination of a client application causes denial of service (CVE-2017-1235)

Security Bulletin

Summary

Termination during an MQGET call of a client application running on a channel with SHARECNV=1, could cause a SIGSEGV and termination of the channel agent process.

Vulnerability Details

CVEID: CVE-2017-1235
DESCRIPTION: IBM MQ could allow an authenticated user to cause a premature termination of a client application thread, which could potentially cause denial of service.
CVSS Base Score: 3.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/123914 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

IBM MQ V8.0

IBM MQ V8.0.0.6 and earlier maintenance levels.

IBM MQ V9.0 Long Term Support Release

IBM MQ V9.0.0.1 and earlier maintenance levels.

IBM MQ V9.0 Continuous Delivery Release

IBM MQ Continuous delivery update 9.0.3 and earlier maintenance levels.

Remediation/Fixes

IBM MQ V8.0

Apply 8.0.0.7 maintenance level.

IBM MQ V9.0 Long Term Support Release

Apply 9.0.0.2 maintenance level.

IBM MQ V9.0 Continuous Delivery Release

Apply continuous delivery update 9.0.4 or later

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Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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*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: IBM MQ termination of a client application causes denial of service (CVE-2017-1235)