Citrix XenServer Multiple Vulnerabilities (CTX223291)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

A server virtualization platform installed on the remote host is
affected by multiple vulnerabilities.

Description :

The version of Citrix XenServer running on the remote host is missing
a security hotfix. It is, therefore, affected by multiple
vulnerabilities :

- An unspecified flaw exists that is triggered when
handling grant transfers. An attacker in a guest virtual
machine can exploit this to gain elevated privileges on
the host. (VulnDB 156796)

- A memory corruption issue exists due to improper
validation of user-supplied input when handling failsafe
callbacks. An attacker in a guest virtual machine can
exploit this to corrupt memory, resulting in a denial of
service condition or the execution of arbitrary code on
the host. (VulnDB 156797)

- An unspecified flaw exists when handling
use-after-mode-change pagetables. An attacker in a guest
virtual machine can exploit this to gain elevated
privileges on the host. (VulnDB 156798)

See also :

https://support.citrix.com/article/CTX223291

Solution :

Apply the appropriate hotfix according to the vendor advisory.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 6.0
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Misc.

Nessus Plugin ID: 100104 ()

Bugtraq ID:

CVE ID:

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