Xen 'vmx.c' Denial of Service Vulnerability

Bugtraq ID:	105817
Class:	Failure to Handle Exceptional Conditions
CVE:	CVE-2018-18883
Remote:	Yes
Local:	No
Published:	Oct 31 2018 12:00AM
Updated:	Jan 02 2019 03:00AM
Credit:	Sergey Dyasli of Citrix
Vulnerable:	Xen Xen 4.11 Xen Xen 4.10.2 Xen Xen 4.10.1 Xen Xen 4.10 Xen Xen 4.9.3 Xen Xen 4.9.2 Xen Xen 4.9.1 Xen Xen 4.9 Citrix XenServer 7.6 Citrix XenServer 7.5 Citrix XenServer 7.1 LTSR CU1
Not Vulnerable:

Xen 'vmx.c' Denial of Service Vulnerability

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

An attacker can exploit this issue to cause a denial-of-service condition.

Xen versions 4.9.0 through 4.11.0 are vulnerable.

Xen 'vmx.c' 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 'vmx.c' Denial of Service Vulnerability

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

Xen 'vmx.c' Denial of Service Vulnerability

References:

• Xen Homepage (XenSource )
  
• CTX239100 Citrix XenServer Security Update (Citrix)
  
• XSA-278 x86: Nested VT-x usable even when disabled (Xen)