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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Event Channel Polling Bug Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System
SecurityTracker Alert ID:  1038731
SecurityTracker URL:  http://securitytracker.com/id/1038731
CVE Reference:   CVE-2017-10917   (Links to External Site)
Updated:  Jul 7 2017
Original Entry Date:  Jun 21 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.4.x
Description:   A vulnerability was reported in Xen. A local user on the guest system can cause denial of service conditions on the host system.

A local user on the guest system can trigger an access control flaw in the hypervisor in event channel polling to cause the target host system to crash.

x86 and ARM systems are affected.

Ankur Arora of Oracle reported this vulnerability.

Impact:   A local user on the guest system can cause the host system to crash.
Solution:   The vendor has issued a fix (xsa221.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-221.html

Vendor URL:  xenbits.xen.org/xsa/advisory-221.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any)

Message History:   None.


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