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

SecurityTracker
Archives


 


Category:   Application (Generic)  >   Citrix XenServer Vendors:   Citrix
(Citrix Issues Fix for Citrix XenServer) Xen Out-of-Bounds Memory Write Error in cirrus_bitblt_cputovideo() Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1037914
SecurityTracker URL:  http://securitytracker.com/id/1037914
CVE Reference:   CVE-2017-2620   (Links to External Site)
Date:  Feb 28 2017
Impact:   User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.0.2, 6.2.0, 6.5, 7.0
Description:   A vulnerability was reported in Xen. A local user on the guest system can gain elevated privileges on the host system. Citrix XenServer is affected.

A local administrative user on the guest system can trigger an out-of-bounds memory write error in cirrus_bitblt_cputovideo() to potentially gain elevated privileges on the host system.

Systems running on x86 with HVM guests and with the qemu process running in dom0 are affectged.

Guest systems with the "cirrus" emulated video card are affected.

ARM systems are not affected.

Systems using only PV guests are not affected.

Gerd Hoffmann of Red Hat reported this vulnerability.

Impact:   A local administrative user on the guest system can gain elevated privileges on the host system.
Solution:   Citrix has issued a fix for CVE-2017-2620 for Citrix XenServer.

The Citrix advisory is available at:

https://support.citrix.com/article/CTX220771

Cause:   Access control error

Message History:   This archive entry is a follow-up to the message listed below.
Feb 22 2017 Xen Out-of-Bounds Memory Write Error in cirrus_bitblt_cputovideo() Lets Local Administrative Users on a Guest System Gain Elevated Privileges on the Host 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 2020, SecurityGlobal.net LLC