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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen PCI MSI-X Interrupt Management Logging Bug Lets Local Guest Users Deny Service
SecurityTracker Alert ID:  1032465
SecurityTracker URL:  http://securitytracker.com/id/1032465
CVE Reference:   CVE-2015-4105   (Links to External Site)
Date:  Jun 3 2015
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 3.3 and later
Description:   A vulnerability was reported in Xen. A local user on the guest system can cause denial of service conditions on the target host system.

A local user on a guest system can invoke certain operations to cause the PCI MXI-X interrupt management logging code to fill up the host disk.

x86 systems are affected. ARM systems are not affected.

HVM guests with their device model run in Dom0 and with access granted to physical MSI-X capable PCI devices can trigger this flaw.

Jan Beulich of SUSE reported this vulnerability.

Impact:   A local user on the guest system can cause the host to consume excessive disk space.
Solution:   The vendor has issued a fix (xsa130-qemuu.patch, xsa130-qemuu-4.3.patch, xsa130-qemut.patch).

The vendor's advisory is available at:

http://xenbits.xen.org/xsa/advisory-130.html

Vendor URL:  xenbits.xen.org/xsa/advisory-130.html (Links to External Site)
Cause:   Resource error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 10 2015 (Ubuntu Issues Fix for QEMU) Xen PCI MSI-X Interrupt Management Logging Bug Lets Local Guest Users Deny Service
Ubuntu has issued a fix for QEMU for Ubuntu 12.04 LTS, 14.04 LTS, 14.10, and 15.04.
Jun 19 2015 (Citrix Issues Fix for Citrix XenServer) Xen PCI MSI-X Interrupt Management Logging Bug Lets Local Guest Users Deny Service
Citrix has issued a fix for Citrix XenServer 6.0.0, 6.0.2, 6.1, 6.2 SP1, 6.5, and 6.5 SP1.
Aug 3 2016 (Citrix Issues Fix for Citrix NetScaler Service Delivery Appliance) Xen PCI MSI-X Interrupt Management Logging Bug Lets Local Guest Users Deny Service
Citrix has issued a fix for Citrix NetScaler Service Delivery Appliance (SDX).



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