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Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix) Linux Kernel Small Stack Guard Page Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1038756
SecurityTracker URL:  http://securitytracker.com/id/1038756
CVE Reference:   CVE-2017-1000364   (Links to External Site)
Date:  Jun 22 2017
Impact:   Execution of arbitrary code via local system, Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 12.04 ESM
Description:   A vulnerability was reported in the Linux kernel. A local user can obtain elevated privileges on the target system.

A local user can trigger a stack memory allocation flaw in certain cases and execute arbitrary code on the target system with elevated privileges.

The kernel's limited stack guard page memory gap can be "jumped" in cases where heap memory and stack memory are adjacent.

The original advisory is available at:

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt

Qualys Research Labs reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://www.ubuntu.com/usn/usn-3338-1

Vendor URL:  www.ubuntu.com/usn/usn-3338-1 (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Jun 20 2017 Linux Kernel Small Stack Guard Page Lets Local Users Gain Elevated Privileges



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