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Security Bulletin: IBM MQ Advanced Message Security is vulnerable to an OpenSSL Montgomery squaring function propagation flaw (CVE-2017-3736)

Security Bulletin


Summary

IBM MQ and IBM WebSphere MQ are affected by an OpenSSL vulnerability which could allow a remote attacker to obtain sensitive information. This is caused by a carry propagation flaw in the the x86_64 Montgomery squaring function bn_sqrx8x_internal().

OpenSSL is used by IBM MQ Advanced Message Security on the IBM i platform only.

Vulnerability Details

CVEID: CVE-2017-3736
DESCRIPTION:
OpenSSL could allow a remote attacker to obtain sensitive information, caused by a carry propagation flaw in the the x86_64 Montgomery squaring function bn_sqrx8x_internal(). An attacker with online access to an unpatched system could exploit this vulnerability to obtain information about the private key.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/134397 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

IBM MQ v8.0

  • Maintenance levels 8.0.0.0 - 8.0.0.8

IBM MQ v9 LTS
  • Maintenance levels 9.0.0.0 - 9.0.0.2

Remediation/Fixes

IBM MQ v8.0

  • Apply Fixpack 8.0.0.9
    IBM MQ v9 LTS
  • Get Notified about Future Security Bulletins

    References

    Complete CVSS v3 Guide
    On-line Calculator v3

    Related information

    IBM Secure Engineering Web Portal
    IBM Product Security Incident Response Blog

    Change History

    17 April 2018: Original version published
    24 April 2018: Correct incorrect reference to v7.0.1 and v7.1 as these versions are not affected
    25 April 2018: Made bulletin clearer that vulnerability only affects AMS on IBM i

    *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

    According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

    Related information


    Cross reference information
    Segment Product Component Platform Version Edition
    Business Integration IBM MQ Advanced Message Security

    Document information

    More support for: IBM MQ
    WMQ Advanced Message Security

    Software version: 8.0, 8.0.0.1, 8.0.0.2, 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.7, 8.0.0.8, 9.0, 9.0.0.1, 9.0.0.2

    Operating system(s): IBM i

    Software edition: All Editions

    Reference #: 2013025

    Modified date: 26 April 2018


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