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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Grant Copy Race Condition Lets Local Administrative Users on a Guest System Cause the Host System to Crash
SecurityTracker Alert ID:  1039653
SecurityTracker URL:  http://securitytracker.com/id/1039653
CVE Reference:   CVE-2017-15597   (Links to External Site)
Date:  Oct 25 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.5.x, 4.6.x, 4.7.x, 4.8.x, 4.9.x
Description:   A vulnerability was reported in Xen. A local administrative user on the guest system can cause denial of service conditions on the host system.

A local administrative user on the guest system can trigger a race condition in certain grant copy operations to cause a memory corruption error in the hypervisor.

x86 and ARM systems are affected.

x86 PV and HVM guests are affected.

Pawel Wieczorkiewicz of Amazon reported this vulnerability.

Impact:   A local administrative user on the guest system can cause denial of service conditions on the host system.
Solution:   The vendor has issued a fix (xsa236-4.5.patch, xsa236-4.9.patch, and xsa236.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-236.html

Vendor URL:  xenbits.xen.org/xsa/advisory-236.html (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 31 2017 (Citrix Issues Fix for Citrix XenServer) Xen Grant Copy Race Condition Lets Local Administrative Users on a Guest System Cause the Host System to Crash
Citrix has issued a fix for Citrix XenServer.



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