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Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
QEMU Symbolic Link Flaw in Plan 9 FS Support Lets Local Users on a Guest System Gain Elevated Privileges on the Host System
SecurityTracker Alert ID:  1037604
SecurityTracker URL:  http://securitytracker.com/id/1037604
CVE Reference:   CVE-2016-9602   (Links to External Site)
Date:  Jan 17 2017
Impact:   Disclosure of system information, Modification of system information, User access via local system
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 local privileged user on the guest system can exploit a symbolic link error to access the host file system and potentially gain elevated privileges on the host system.

Systems with VirtFS and directory sharing via Plan 9 File System (9pfs) support are affected.

Jann Horn of Google Project Zero reported this vulnerability.

Impact:   A local privileged user on the guest system can access the host file system and potentially gain elevated privileges on the host system.
Solution:   No upstream solution was available at the time of this entry. A proposed patch is available at:

https://bugzilla.redhat.com/show_bug.cgi?id=1413929

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:   None.


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