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Category:   Application (VPN)  >   OpenSSH Vendors:   OpenSSH.org
OpenSSH AcceptEnv Wildcard Processing Flaw May Let Remote Authenticated Users Bypass Environment Restrictions
SecurityTracker Alert ID:  1029925
SecurityTracker URL:  http://securitytracker.com/id/1029925
CVE Reference:   CVE-2014-2532   (Links to External Site)
Date:  Mar 18 2014
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 6.6
Description:   A vulnerability was reported in OpenSSH. A remote authenticated user can bypass environment restrictions in certain cases.

When configured for environment passing (not the default), the software does not properly process wildcard characters on AcceptEnv lines in the 'sshd_config' configuration file. A remote user may be able to supply specially crafted parameter values to bypass environment restrictions and set certain environment variables.

Impact:   A remote authenticated user can bypass environment restrictions in certain cases and set certain environment variables.
Solution:   The vendor has issued a fix (6.6).

The vendor's advisory is available at:

http://www.openssh.org/txt/release-6.6

Vendor URL:  www.openssh.org/txt/release-6.6 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 18 2014 (IBM Issues Fix for IBM AIX) OpenSSH AcceptEnv Wildcard Processing Flaw May Let Remote Authenticated Users Bypass Environment Restrictions
IBM has issued a fix for IBM AIX 5.3, 6.1, and 7.1.
Oct 1 2015 (Apple Issues Fix for Apple OS X) OpenSSH AcceptEnv Wildcard Processing Flaw May Let Remote Authenticated Users Bypass Environment Restrictions
Apple has issued a fix for Apple OS X.
Apr 20 2016 (Oracle Issues Fix for Oracle Communications Applications) OpenSSH AcceptEnv Wildcard Processing Flaw May Let Remote Authenticated Users Bypass Environment Restrictions
Oracle has issued a fix for Oracle Communications Applications User Data Repository.



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