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Category:   Application (Generic)  >   GNOME NetworkManager Vendors:   Gnome Development Team
Ubuntu network-manager-applet Permission Checking Flaw Lets Local Users Bypass Login Screen Security Restrictions
SecurityTracker Alert ID:  1037977
SecurityTracker URL:  http://securitytracker.com/id/1037977
CVE Reference:   CVE-2017-6590   (Links to External Site)
Updated:  Mar 10 2017
Original Entry Date:  Mar 10 2017
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Ubuntu network-manager-applet (network-manager-gnome). A local user can bypass login screen security restrictions.

The GNOME frontend for NetworkManager does not properly check permissions when connecting to certain wireless networks.

A physically local user that can connect via wifi to an access point that uses a certificate to login can bypass the Ubuntu login screen to access local files and potentially execute arbitrary commands with the privileges of the 'lightdm' user.

Frederic Bardy and Quentin Biguenet reported this vulnerability.

Impact:   A physically local user can bypass login screen security controls to access files and potentially execute commands on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-3217-1

Vendor URL:  www.ubuntu.com/usn/usn-3217-1 (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 LTS, 14.04 LTS, 16.04 LTS, 16.10

Message History:   None.


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