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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Shadow Paging Emulation Race Condition Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1038723
SecurityTracker URL:  http://securitytracker.com/id/1038723
CVE Reference:   CVE-2017-10915   (Links to External Site)
Updated:  Sep 13 2017
Original Entry Date:  Jun 20 2017
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Xen. A local user on the guest system can gain elevated privileges on the host system.

A local user on two guest systems can trigger a race condition in shadow paging emulation to gain elevated privileges on the host system.

x86 systems are affected.

ARM systems are not affected.

Andrew Cooper of Citrix reported this vulnerability.

Impact:   A local user on the guest system can gain elevated privileges on the host system.
Solution:   The vendor has issued a fix (xsa219-4.5.patch, xsa219-4.6.patch, xsa219-4.8.patch, and xsa219.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-219.html

Vendor URL:  xenbits.xen.org/xsa/advisory-219.html (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   None.


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