SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   Application (VPN)  >   OpenSSH Vendors:   OpenSSH.org
(Ubuntu Issues Fix) OpenSSH X11 Forwarding Flaw Lets Users Bypass Trust Restrictions
SecurityTracker Alert ID:  1035799
SecurityTracker URL:  http://securitytracker.com/id/1035799
CVE Reference:   CVE-2016-1908   (Links to External Site)
Date:  May 9 2016
Impact:   Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7.1p2
Description:   A vulnerability was reported in OpenSSH. A remote authenticated user can bypass security restrictions in certain cases.

A remote authenticated X application can trigger a flaw in the handling of errors when generating authentication cookies for untrusted X11 forwarding to establish a trusted connection to the target local X server when only untrusted X11 forwarding was requested. As a result, the remote X client may gain privileged access to the target local X server.

Thomas Hoger reported this vulnerability.

Impact:   A remote authenticated X client can cause X11 forwarding trust to fallback from untrusted to trusted to gain privileged access to the target local X server.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2966-1

Vendor URL:  www.ubuntu.com/usn/usn-2966-1 (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 LTS, 14.04 LTS, 15.10

Message History:   This archive entry is a follow-up to the message listed below.
Jan 19 2016 OpenSSH X11 Forwarding Flaw Lets Users Bypass Trust Restrictions



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2020, SecurityGlobal.net LLC