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Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1034858
SecurityTracker URL:  http://securitytracker.com/id/1034858
CVE Reference:   CVE-2016-1714   (Links to External Site)
Date:  Jan 28 2016
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.

A privileged local user with CAP_SYS_RAWIO capabilities on the guest system can trigger an out-of-bounds read/write access error when processing firmware configurations and cause denial of service conditions or gain elevated privileges on the host system.

Systems with the current configuration entry value set to invalid (FW_CFG_INVALID=0xffff) are affected.

Systems built with the Firmware Configuration device emulation support are affected.

Impact:   A local privileged user on the guest system can gain elevated privileges on the host system.
Solution:   The vendor has issued a source code fix, available at:

https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00428.html

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.
Jan 29 2016 (Red Hat Issues Fix for Red Hat Enterprise Virtualization) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Red Hat has issued a fix for Red Hat Enterprise Virtualization for Red Hat Enterprise Linux.
Jan 29 2016 (Red Hat Issues Fix) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Jan 29 2016 (Red Hat Issues Fix) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Red Hat has issued a fix for qemu-kvm for Red Hat Enterprise Linux 7.
Jan 29 2016 (Red Hat Issues Fix for Red Hat Enterprise Virtualization) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Red Hat has issued a fix for Red Hat Enterprise Virtualization for Red Hat Enterprise Linux.
Jan 29 2016 (Oracle Issues Fix for Oracle Linux) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Oracle has issued a fix for Oracle Linux 6.
Jan 29 2016 (Oracle Issues Fix for Oracle Linux) QEMU Firmware Configuration Processing Access Flaw Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
Oracle has issued a fix for Oracle Linux 7.



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