Xen 'xen/common/memory.c' Denial of Service vulnerability

Bugtraq ID:	103174
Class:	Design Error
CVE:	CVE-2018-7540
Remote:	Yes
Local:	No
Published:	Feb 27 2018 12:00AM
Updated:	Mar 23 2018 08:00AM
Credit:	Jann Horn of Google Project Zero.
Vulnerable:	Xen Xen 4.9 Xen Xen 4.8 Xen Xen 4.7 Xen Xen 4.6 Xen Xen 4.9 Xen Xen 4.6.3 Xen Xen 4.5.3 Xen Xen 4.5.0 Xen Xen 4.5 Xen Xen 4.10 Citrix XenServer 6.0.2 Citrix XenServer 4.1 Citrix XenServer 7.3 Citrix XenServer 7.2 Citrix XenServer 7.1 CU1 Citrix XenServer 7.1 Citrix XenServer 7.0 Citrix XenServer 6.5 Citrix XenServer 6.2 Citrix XenServer 6.1 Citrix XenServer 6.0 Citrix XenServer 5.6 Citrix XenServer 5.5 Citrix XenServer 5.0
Not Vulnerable:

Xen 'xen/common/memory.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 'xen/common/memory.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 'xen/common/memory.c' Denial of Service vulnerability

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

Xen 'xen/common/memory.c' Denial of Service vulnerability

References:

• Xen Homepage (XenSource )
  
• Xen Security Advisory 252 - DoS via non-preemptable L3/L4 pagetable freeing (Seclists.org)
  
• Citrix XenServer Multiple Security Updates (Citrix)
  
• DoS via non-preemptable L3/L4 pagetable freeing (Xen)
  
• XSA-252 (Xen)