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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
(Xen Project Issues Fix for Xen) QEMU IDE Heap Overflow Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1033077
SecurityTracker URL:  http://securitytracker.com/id/1033077
CVE Reference:   CVE-2015-5154   (Links to External Site)
Date:  Jul 27 2015
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in QEMU. A local user on the guest system can gain elevated privileges on the host system. Xen is affected.

A local privileged user on a guest system that has a CDROM drive enabled can issue specially crafted ATAPI commands to trigger a heap overflow in the IDE subsystem to execute arbitrary code on the host systems. The code will run on the host with the privileges of the QEMU process assigned to the guest system.

Kevin Wolf of Red Hat reported this vulnerability.

Impact:   A local privileged user on the guest system can gain elevated privileges on the host system.
Solution:   Xen Project has issued a fix for Xen:

http://xenbits.xen.org/xsa/xsa138-qemut-1.patch
http://xenbits.xen.org/xsa/xsa138-qemut-2.patch
http://xenbits.xen.org/xsa/xsa138-qemuu-1.patch
http://xenbits.xen.org/xsa/xsa138-qemuu-2.patch
http://xenbits.xen.org/xsa/xsa138-qemuu-3.patch

x86 HVM guests without stubdomains and configured with an emulated CD-ROM driver model are affected.

PV guests are not affected.

The Xen Project advisory is available at:

http://xenbits.xen.org/xsa/advisory-138.html

Vendor URL:  xenbits.xen.org/xsa/advisory-138.html (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 27 2015 QEMU IDE Heap Overflow Lets Local Users on a Guest System Gain Elevated Privileges on the Host System



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