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Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1032306
SecurityTracker URL:  http://securitytracker.com/id/1032306
CVE Reference:   CVE-2015-3456   (Links to External Site)
Date:  May 13 2015
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.3.0 and prior versions
Description:   A vulnerability was reported in QEMU. A local user on the guest system can obtain elevated privileges on the target host system.

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:   The vendor has issued a source code fix, available at:

http://git.qemu.org/?p=qemu.git;a=commitdiff;h=e907746266721f305d67bc0718795fedee2e824c

Vendor URL:  wiki.qemu.org/Main_Page (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
May 13 2015 (Red Hat Issues Fix for KVM) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Red Hat has issued an advisory for KVM for Red Hat Enterprise Linux 5.
May 13 2015 (Red Hat Issues Fix) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6 and 7.
May 13 2015 (Red Hat Issues Fix) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Virtualization.
May 13 2015 (Ubuntu Issues Fix) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Ubuntu has issued a fix for Ubuntu 12.04 LTS, 14.04 LTS, 14.10, and 15.04.
May 14 2015 (Citrix Issues Fix for Citrix XenServer) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Citrix has issued a fix for Citrix XenServer 6.0, 6.0.2, 6.1.0, 6.2.0, and 6.5.
May 16 2015 (Red Hat Issues Fix for Red Hat Enterprise Virtualization) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Virtualization.
May 16 2015 (Oracle Issues Fix for Oracle VirtualBox) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Oracle has issued a fix for Oracle VirtualBox.
May 17 2015 (Oracle Issues Fix for Oracle VM) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Oracle has issued a fix for Oracle VM.
May 27 2015 (Red Hat Issues Fix) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 6.5.
May 28 2015 (F5 Networks Issues Advisory for F5 BIG-IP) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
F5 Networks has issued an advisory for F5 BIG-IP.
Jun 9 2015 (HP Issues Advisory for HP Helion CloudSystem) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
HP has issued an advisory for HP Helion CloudSystem 8.x.
Jul 10 2015 (Juniper Issues Fix for Juniper Junos EX4600/QFX5100/QFX10002) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
Juniper has issued a fix for Juniper Junos for EX4600, QFX5100, and QFX10002.
Oct 5 2015 (IBM Issues Fix for IBM Flex System Manager) QEMU Floppy Disk Controller Emulation Flaw Lets Local Users Gain Elevated Privileges
IBM has issued a fix for IBM Flex System Manager.



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