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Category:   Device (Embedded Server/Appliance)  >   McAfee Web Gateway Vendors:   McAfee
(McAfee Issues Fix for McAfee Web Gateway) Linux Kernel Small Stack Guard Page Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1039051
SecurityTracker URL:  http://securitytracker.com/id/1039051
CVE Reference:   CVE-2017-1000364   (Links to External Site)
Date:  Aug 2 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): 7.6.2.14 and prior, 7.7.2.2 and prior
Description:   A vulnerability was reported in the Linux kernel. A local user can obtain elevated privileges on the target system. McAfee Web Gateway is affected.

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:   McAfee has issued a fix for CVE-2017-1000364 for McAfee Web Gateway (7.6.2.15, 7.7.2.3).

[Editor's note: The vendor states that default installations that do not have a local shell user are not affected.]

The McAfee advisory is available at:

https://kc.mcafee.com/corporate/index?page=content&id=SB10205

Vendor URL:  kc.mcafee.com/corporate/index?page=content&id=SB10205 (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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