SecurityTracker.com
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 


Category:   OS (Linux)  >   Linux Kernel Vendors:   kernel.org
(Ubuntu Issues Fix for Linux Kernel) Xen I/O Port Access Missing PHYSDEVOP_set_iopl Hypercall Lets Local Users on a Guest System Gain Elevated Privileges on the Guest System
SecurityTracker Alert ID:  1035771
SecurityTracker URL:  http://securitytracker.com/id/1035771
CVE Reference:   CVE-2016-3157   (Links to External Site)
Date:  May 6 2016
Impact:   Denial of service via local system, Disclosure of system information, Disclosure of user information, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Ubuntu 16.04 LTS
Description:   A vulnerability was reported in Xen. A local user on the guest system can gain elevated privileges on the guest system. The Linux Kernel is affected.

A local user on the guest system can access I/O ports without proper permissions. As a result, the local user can cause the guest to crash, obtain potentially sensitive information from the guest system, or gain elevated privileges on the guest system.

The vulnerability is due to a missing hypercall (PHYSDEVOP_set_iopl).

x86-64 Linux systems configured as PV guests are affected.

x86 HVM guests are not affected.

32-bit Linux guests are not affected.

ARM systems are not affected.

Andy Lutomirski reported this vulnerability.

Impact:   A local user on the guest system can cause the guest to crash, obtain potentially sensitive information from the guest system, or gain elevated privileges on the guest system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

http://www.ubuntu.com/usn/usn-2965-1

Vendor URL:  www.ubuntu.com/usn/usn-2965-1 (Links to External Site)
Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Mar 17 2016 Xen I/O Port Access Missing PHYSDEVOP_set_iopl Hypercall Lets Local Users on a Guest System Gain Elevated Privileges on the Guest System



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

This web site uses cookies for web analytics. Learn More

Copyright 2022, SecurityGlobal.net LLC