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Category:   Application (Generic)  >   Xen Vendors:   Xen Project
Xen Buffer Overflow in 'xl' Command Line Lets Local Guest System Users Gain Privileges on the Host System in Certain Cases
SecurityTracker Alert ID:  1032973
SecurityTracker URL:  http://securitytracker.com/id/1032973
CVE Reference:   CVE-2015-3259   (Links to External Site)
Date:  Jul 17 2015
Impact:   Execution of arbitrary code via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.1 and after
Description:   A vulnerability was reported in Xen. A local user on the guest system can gain elevated privileges on the host system in certain cases.

A local user on the guest system can supply specially crafted data to an application to be passed as command line parameters via the xl command line utility to trigger a buffer overflow and execute arbitrary code on the target system.

This can be exploited to gain elevated privileges on the host systems.

Applications that use the xl command line and pass arbitrary data to the xl command line are affected.

Applications that use the libxl library are not affected.

Donghai Zhu of Alibab reported this vulnerability.

Impact:   A local user on the guest system can gain elevated privileges on the host system.
Solution:   The vendor has issued a fix (xsa137.patch).

The vendor's advisory is available at:

http://xenbits.xen.org/xsa/advisory-137.html

Vendor URL:  xenbits.xen.org/xsa/advisory-137.html (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Any)

Message History:   None.


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