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Security Bulletin: IBM MQ and IBM MQ Appliance are vulnerable to a denial of service attack within the TLS key renegotiation functions (CVE-2019-4055)

Security Bulletin


Summary

A vulnerability was discovered within the TLS key renegotiation functions which could be exploited to execute a denial of service attack against an IBM MQ queue manager.

Vulnerability Details

CVEID: CVE-2019-4055
DESCRIPTION: IBM MQ is vulnerable to a denial of service attack within the TLS key renegotiation function.
CVSS Base Score: 7.5
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/156564 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

IBM MQ and IBM MQ Appliance V8
versions 8.0.0.0 - 8.0.0.10
IBM MQ V9 LTS
versions 9.0.0.0 - 9.0.0.5
IBM MQ and IBM MQ Appliance V9.1 LTS
versions 9.1.0.0 - 9.1.0.1
IBM MQ and IBM MQ Appliance V9.1 CD
versions 9.1.0 - 9.1.1

Remediation/Fixes

IBM MQ and IBM MQ Appliance V8
IBM MQ V9 LTS
IBM MQ and IBM MQ Appliance V9.1 LTS
IBM MQ and IBM MQ Appliance V9.1 CD

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

16 April 2019: Original version published

*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.

Internal Use Only

IBM MQ Product Record: 129401
IBM MQ Appliance Product Record: 130605
Advisory: 14925

Document Location

Worldwide

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Document Information

Modified date:
16 April 2019

UID

ibm10870484

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