Xen HLE Constructs Denial of Service Vulnerability

Bugtraq ID:	105954
Class:	Failure to Handle Exceptional Conditions
CVE:	CVE-2018-19967
Remote:	No
Local:	No
Published:	Nov 06 2018 12:00AM
Updated:	Apr 03 2019 12:00PM
Credit:	None
Vulnerable:	XenSource Xen 0 Citrix XenServer 7.6 Citrix XenServer 7.5 Citrix XenServer 7.1 LTSR CU1 Citrix XenServer 7.0
Not Vulnerable:

Xen HLE Constructs Denial of Service Vulnerability

Xen is prone to a denial-of-service vulnerability.

An attacker with a guest account can exploit this issue to cause CPU to hang, denying service to legitimate users.

Xen HLE Constructs Denial of Service Vulnerability

Currently, we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Xen HLE Constructs Denial of Service Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

Xen HLE Constructs Denial of Service Vulnerability

References:

• Xen Homepage (XenSource )
  
• Xen Security Advisory 282 v1 - guest use of HLE constructs may lock up host (Xen)
  
• Citrix XenServer Security Update (Citrix)