BugTraq
CVE-2014-2881 - Poor Quality Implementation of Diffie-Hellman Key Exchange in Citrix Netscaler May 06 2014 05:16PM
Portcullis Advisories (advisories portcullis-security com)
Vulnerability title: Poor Quality Implementation of Diffie-Hellman Key
Exchange in Citrix Netscaler
CVE: CVE-2014-2881
Vendor: Citrix
Product: Netscaler
Affected version: All prior to 10.1-122.17/9.3-66.5
Fixed version: 10.1-122.17/9.3-66.5
Reported by: Graham Sutherland

Details:

The remote configuration Java applet contains a poor implementation of
the Diffie-Hellman key exchange algorithm. The random number generator
used to produce secret values is the java.util.Random class, which is
not of cryptographic quality. Publicly known predictors exist for the
underlying RNG, and the seed is either 32-bit or 48-bit depending on the
host system.

Furthermore, the selection of the secret 'a' value within the key
generation process is potentially vulnerable to timing attacks that leak
the RNG state, as the implementation loops until the RNG outputs a value
within a publicly known range.

Further details at:
https://www.portcullis-security.com/security-research-and-downloads/secu
rity-advisories/cve-2014-2881/

Copyright:
Copyright (c) Portcullis Computer Security Limited 2014, All rights
reserved worldwide. Permission is hereby granted for the electronic
redistribution of this information. It is not to be edited or altered in
any way without the express written consent of Portcullis Computer
Security Limited.

Disclaimer:
The information herein contained may change without notice. Use of this
information constitutes acceptance for use in an AS IS condition. There
are NO warranties, implied or otherwise, with regard to this information
or its use. Any use of this information is at the user's risk. In no
event shall the author/distributor (Portcullis Computer Security
Limited) be held liable for any damages whatsoever arising out of or in
connection with the use or spread of this information.

[ reply ]


 

Privacy Statement
Copyright 2010, SecurityFocus