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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Interrupt Masking Flaw Lets Local Users on a Guest System Cause Denial of Service Conditions on the Host System
SecurityTracker Alert ID:  1037517
SecurityTracker URL:  http://securitytracker.com/id/1037517
CVE Reference:   CVE-2016-10024   (Links to External Site)
Date:  Dec 21 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.4.x, 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 cause denial of service conditions on the host system.

A local user on the guest system can perform certain kernel operations (e.g., page table writes) that asynchronously modify the kernel's instruction stream to mask interrupts and cause the host system to hang or crash.

x86 PV guests are affected.

Jan Beulich of SUSE reported this vulnerability.

Impact:   A local user on the guest system can cause the target host system to hang or crash.
Solution:   The vendor has issued a fix (xsa202-4.4.patch, xsa202-4.6.patch, and xsa202.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-202.html

Vendor URL:  xenbits.xen.org/xsa/advisory-202.html (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  Linux (Any)

Message History:   None.


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