Xen Shadow Mode Page Use Reference Counting Error Handling Guest-to-Host DoS (XSA-250)

This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.


Synopsis :

The remote Xen hypervisor installation is missing a security update.

Description :

According to its self-reported version number, the Xen hypervisor
installed on the remote host is affected by a guest-to-host denial
of service vulnerability.

Note that x86 systems are vulnerable. ARM systems are not vulnerable.

Note that Nessus has checked the changeset versions based on the
xen.git change log. Nessus did not check guest hardware configurations
or if patches were applied manually to the source code before a
recompile and reinstall.

See also :

http://xenbits.xen.org/xsa/advisory-250.html
https://xenbits.xen.org/gitweb/?p=xen.git;a=summary

Solution :

Apply the appropriate patch according to the vendor advisory.

Risk factor :

Medium / CVSS Base Score : 6.9
(CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.1
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 105492 ()

Bugtraq ID:

CVE ID: CVE-2017-17564

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