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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel ptrace() Namespace Bug Lets Local Users Obtain Elevated Privileges
SecurityTracker Alert ID:  1034899
SecurityTracker URL:  http://securitytracker.com/id/1034899
CVE Reference:   CVE-2015-8709   (Links to External Site)
Date:  Feb 2 2016
Impact:   Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Linux kernel. A local user can obtain elevated privileges on the target system.

A local privileged namespace user can trigger a flaw in the ptrace() system call to potentially gain elevated privileges outside of the original namespace.

Systems built with User Namespace (CONFIG_USER_NS) support are affected.

Impact:   A local privileged namespace user can obtain elevated privileges outside of the original namespace on the target system.
Solution:   The vendor has issued a source code fix [in December 2015], available at:

https://lkml.org/lkml/2015/12/25/71

Vendor URL:  www.kernel.org/ (Links to External Site)
Cause:   Access control error

Message History:   None.


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