Brocade Security Advisory

Brocade Security Advisory ID:

BSA-2017-254

 

Risk Impact:

Medium

Initial Publication Date:

May 2, 2017

 

Workaround:

N/A

Last Updated:

 

 

Component:

Open SSH

Revision:

1.0: Interim

 

CVSS Score:

6.4

 

Affected CVE(s):

CVE-2013-4548

 

 

 

 

 

 

 

Summary

The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.

Affected Products

Brocade is investigating its product lines to determine which products may be affected by this vulnerability and the impact on each affected product.

Products Confirmed Not Vulnerable

Brocade FastIron OS, Brocade NetIron OS, Brocade Network Advisor, Brocade ServerIron ADX, Brocade Services Director, Brocade SLX-OS, Brocade Virtual ADX, Brocade Virtual Traffic Manager, and Brocade Virtual Web Application Firewall are confirmed not affected by this vulnerability.

Workaround

There are no workarounds that address this vulnerability.

Revision History

Version

Change

Date

1.0

Initial Publication

May 2, 2017

 

 

 

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN AS-IS BASIS SOLELY FOR INFORMATIONAL PURPOSES AND DOES NOT IMPLY ANY KIND OF GUARANTY OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. YOUR USE OF THE INFORMATION CONTAINED HEREIN IS AT YOUR OWN RISK. ALL INFORMATION PROVIDED HEREIN IS BASED ON BROCADE'S CURRENT KNOWLEDGE AND UNDERSTANDING OF THE VULNERABILITY AND IMPACT TO BROCADE HARDWARE AND SOFTWARE PRODUCTS. BROCADE RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.