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Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for Citrix XenServer) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1032325
SecurityTracker URL:  http://securitytracker.com/id/1032325
CVE Reference:   CVE-2015-3456   (Links to External Site)
Updated:  Aug 5 2015
Original Entry Date:  May 14 2015
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.0, 6.0.2, 6.1.0, 6.2.0, 6.5
Description:   A vulnerability was reported in QEMU. A local user on the guest system can obtain elevated privileges on the target host system. Citrix XenServer is affected.

A local user on the guest system can supply specially crafted commands (e.g., FD_CMD_READ_ID, FD_CMD_DRIVE_SPECIFICATION_COMMAND) to trigger a memory corruption error and execute arbitrary code on the target host system with the privileges of the QEMU process on the host.

VMware, Microsoft Hyper-V, and Bochs hypervisors are not affected.

The original advisory is available at:

http://venom.crowdstrike.com/

Jason Geffner, CrowdStrike Senior Security Researcher, reported this vulnerability.

Impact:   A local user on the guest system can obtain elevated privileges on the target host system.
Solution:   Citrix has issued a fix for Citrix XenServer.

For 6.0.0: CTX142477

For 6.0.2 Common Criteria: CTX142479

For 6.0.2: CTX142478

For 6.1: CTX142480

For 6.2 SP1: CTX142481

For 6.5: CTX142482

For 6.5 SP1: CTX142483

The Citrix advisory is available at:

http://support.citrix.com/article/CTX201078

Vendor URL:  wiki.qemu.org/Main_Page (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
May 13 2015 QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges



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