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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1037963
SecurityTracker URL:  http://securitytracker.com/id/1037963
CVE Reference:   CVE-2017-2636   (Links to External Site)
Date:  Mar 7 2017
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.10.1 and prior
Description:   A vulnerability was reported in the Linux kernel. A local user can obtain elevated privileges on the target system.

A local user that can set the HDLC line discipline on the tty device can trigger a race condition and double free memory in the N_HLDC Linux kernel driver to gain elevated privileges on the target system.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   A proposed patch is available at:

http://www.openwall.com/lists/oss-security/2017/03/07/6

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

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 18 2017 (Red Hat Issues Fix) Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.4.
May 1 2017 (Oracle Issues Fix for Oracle Linux) Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
Oracle has issued a fix for Oracle Linux 6.
May 16 2017 (Red Hat Issues Fix) Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.5.
May 16 2017 (Red Hat Issues Fix) Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.7.
Jun 20 2017 (Red Hat Issues Fix) Linux Kernel Race Condition in N_HLDC Driver Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.6.



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