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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Trap Handling Flaw Lets Local Guest System Users Deny Service on the Host System
SecurityTracker Alert ID:  1030724
SecurityTracker URL:  http://securitytracker.com/id/1030724
CVE Reference:   CVE-2014-5147   (Links to External Site)
Date:  Aug 13 2014
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Xen. A local user on a guest system can cause denial of service conditions on the host system.

A local user on a 64-bit kernel on a 64-bit domain guest and with permissions to spawn a 32-bit application can trigger a trap handling flaw and cause the host system to crash.

x86 systems are not affected.

32-bit ARM systems are not affected

64-bit ARM systems that support 32-bit domains are affected.

Riku Voipio (using Linaro's LAVA testing) and Ian Campbell reported this vulnerability.

Impact:   A local user on a guest system can cause denial of service conditions on the target host system.
Solution:   The vendor has issued a fix (xsa102-4.4-01.patch, xsa102-4.4-02.patch, xsa102-4.4-03.patch, xsa102-unstable-01.patch, xsa102-unstable-02.patch, xsa102-unstable-03.patch)
Vendor URL:  www.xen.org/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any)

Message History:   None.


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