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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen ioport Array Overflow Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the QEMU Process
SecurityTracker Alert ID:  1037397
SecurityTracker URL:  http://securitytracker.com/id/1037397
CVE Reference:   CVE-2016-9637   (Links to External Site)
Date:  Dec 6 2016
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Xen. A local administrative user on the guest system can gain elevated privileges on the qemu process.

A local administrative user on the guest system can trigger an array overflow in ioport to gain qemu process privileges on the host system.

PV guests are not affected.

ARM systems are not affected.

yanghongke@huawei.com of the Huawei Security Test Team reported this vulnerability.

Impact:   A local administrative user on the guest system can gain QEMU process privileges.
Solution:   The vendor has issued a fix (xsa199-trad.patch).

The vendor advisory is available at:

https://xenbits.xen.org/xsa/advisory-199.html

Vendor URL:  xenbits.xen.org/xsa/advisory-199.html (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Dec 20 2016 (Red Hat Issues Fix) Xen ioport Array Overflow Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the QEMU Process
Red Hat has issued a fix for Red Hat Enterprise Linux 5.
Dec 21 2016 (Oracle Issues Fix for Oracle Linux) Xen ioport Array Overflow Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the QEMU Process
Oracle has issued a fix for Oracle Linux 5.
Dec 21 2016 (CentOS Issues Fix) Xen ioport Array Overflow Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the QEMU Process
CentOS has issued a fix for CentOS 5.



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