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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen P2M Mapping Error Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1038732
SecurityTracker URL:  http://securitytracker.com/id/1038732
CVE Reference:   CVE-2017-10918   (Links to External Site)
Updated:  Jul 7 2017
Original Entry Date:  Jun 21 2017
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.5.x, 4.6.x, 4.7.x, 4.8.x
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 the guest system can trigger a memory allocation error in the physical-to-machine (P2M) mapping and access restricted memory to gain elevated privileges on the host system.

x86 and ARM systems are affected.

On x86 systems, only HVM guests are affected.

This issue was discovered by Julien Grall of ARM.

Impact:   A local user on the guest system can gain elevated privileges on the host system.
Solution:   The vendor has issued a fix (xsa222-1-4.6.patch, xsa222-1-4.7.patch, xsa222-1.patch, xsa222-2-4.5.patch, xsa222-2-4.6.patch, xsa222-2-4.7.patch, xsa222-2-4.8.patch, and xsa222-2.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-222.html

Vendor URL:  xenbits.xen.org/xsa/advisory-222.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any)

Message History:   None.


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