Brocade Security Advisory

Brocade Security Advisory ID:

BSA-2017-255

 

Risk Impact:

High

Initial Publication Date:

May 2, 2017

 

Workaround:

N/A

Last Updated:

 

 

Component:

OpenSSH

Revision:

1.0: Interim

 

CVSS Score:

7.8

 

Affected CVE(s):

CVE-2015-5600

 

 

 

 

 

 

 

Summary

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

Affected Products

Product

Current Assessment

Brocade 5400 vRouter

Impacted: Fixed in 6.7R13.

Brocade 5600 vRouter

Impacted: Fixed in 17.1.0.

Brocade Services Director

Impacted: Fixed in 2.4 and later.

Brocade Virtual Traffic Manager

Impacted: Appliance fixed in 10.4, 9.9r1, and later.

Products Confirmed Not Vulnerable

Brocade FastIron OS, Brocade NetIron OS, Brocade Network Advisor, Brocade ServerIron ADX, Brocade SLX-OS, Brocade Virtual ADX, Brocade Virtual Traffic Manager: Software, 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.