Security Bulletin: Vulnerabilities in OpenSSH affect IBM XIV Gen2 (CVE-2016-0777, CVE-2016-0778)

Security Bulletin

Summary

An information leak flaw and buffer overflow flaw in the way the OpenSSH client roaming feature was implemented affects IBM XIV Gen2.

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 https://exchange.xforce.ibmcloud.com/vulnerabilities/109635 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) CVEID: CVE-2016-0778 DESCRIPTION: OpenSSH is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the packet_write_wait() and ssh_packet_write_wait() API functions when two non-default options: a ProxyCommand and either ForwardAgent or ForwardX11are used. By persuading a victim to connect to a malicious server, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash. CVSS Base Score: 5 CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/109636* for the current score CVSS Environmental Score*: Undefined CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L)

Affected Products and Versions

IBM XIV Gen2 systems running microcode versions 10.0 or later are affected.

Remediation/Fixes

Applying a non-disruptive patch that fixes this issue is available for versions 10.2.4.e-5 and 10.2.4.e-8. The application of this patch can be done via remote connection and would take about 5 minutes to be completed.

For versions other than 10.2.4.e-5 and 10.2.4.e-8, IBM recommends upgrading to a fixed, supported version of the product.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

2 February 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.

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: Vulnerabilities in OpenSSH affect IBM XIV Gen2 (CVE-2016-0777, CVE-2016-0778)