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Security Bulletin: Vulnerabilities in OpenSSH affect IBM MQ Appliance (CVE-2016-0777)

Security Bulletin


An information leak flaw and buffer overflow flaw in the way the OpenSSH client roaming feature was implemented affects IBM MQ Appliance.

Vulnerability Details

CVEID: CVE-2016-0777
DESCRIPTION: OpenSSH could allow a remote attacker to obtain sensitive information, caused by a client information leak from using the roaming connection feature. By persuading a victim to connect to a malicious server, an attacker could exploit this vulnerability to retrieve private cryptographic keys or other sensitive information.
CVSS Base Score: 6.5
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)

Affected Products and Versions

IBM MQ Appliance M2000


Apply the ifix for APAR IT13223.

Workarounds and Mitigations

In most cases the IBM MQ Appliance is not affected by this issue. The exception
is where you have a high availability configuration where the two appliances are
not directly connected (that is, they are remotely situated and connected by means of
a switch or similar).

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Change History

26 January 2016 : 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.


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.

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Product Synonym


Document Information

Modified date:
15 June 2018