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Category:   OS (UNIX)  >   NetBSD Vendors:   NetBSD
NetBSD Xen-amd64 Port Logic Error Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1038127
SecurityTracker URL:  http://securitytracker.com/id/1038127
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Mar 24 2017
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 6.0 - 6.0.5, 6.1 - 6.1.4, 7.0 - 7.0.2
Description:   A vulnerability was reported in NetBSD. A local user on the guest system can gain elevated privileges on the host system.

A local user on the guest system can exploit a logic error in the Xen-amd64 port in the flushing of the Translation Look-Aside Buffer (TLB) when switching virtual memory to execute arbitrary code with kernel-level privileges on the host system.

Maxime Villard reported this vulnerability.

Impact:   A local user on the guest system can gain kernel-level privileges on the host system.
Solution:   The vendor has issued a fix.

The vendor advisory is available at:

http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-003.txt.asc

Vendor URL:  ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-003.txt.asc (Links to External Site)
Cause:   Access control error, State error

Message History:   None.


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