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Category:   Application (Generic)  >   X Vendors:   X.org
(Ubuntu Issues Fix) X.Org Command Line Validation Flaw Lets Remote Authenticated Users Gain Elevated Privileges and Delete Arbitrary Files
SecurityTracker Alert ID:  1041982
SecurityTracker URL:  http://securitytracker.com/id/1041982
CVE Reference:   CVE-2018-14665   (Links to External Site)
Date:  Oct 26 2018
Impact:   Denial of service via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.19 and later
Description:   A vulnerability was reported in X.Org. A remote authenticated user can gain elevated privileges and delete arbitrary files.

A remote authenticated user can exploit a command line validation flaw to specify a '-modulepath' argument with an insecure path to cause arbitrary code to be executed on the target system.

A remote authenticated user can also exploit a command line validation flaw in the '-logfile' argument to cause arbitrary files to be deleted on the target system.

These can be exploited on systems that have the X.org X server running with elevated privileges and started by a non-root users.

Narendra Shinde reported this vulnerability.

Impact:   A remote authenticated user can gain elevated privileges and delete arbitrary files on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3802-1

Vendor URL:  usn.ubuntu.com/usn/usn-3802-1 (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  16.04 LTS, 18.04 LTS, 18.10

Message History:   This archive entry is a follow-up to the message listed below.
Oct 25 2018 X.Org Command Line Validation Flaw Lets Remote Authenticated Users Gain Elevated Privileges and Delete Arbitrary Files



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