GLSA-201309-24 : Xen: Multiple vulnerabilities

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201309-24
(Xen: Multiple vulnerabilities)

Multiple vulnerabilities have been discovered in Xen. Please review the
CVE identifiers referenced below for details.

Impact :

Guest domains could possibly gain privileges, execute arbitrary code, or
cause a Denial of Service on the host domain (Dom0). Additionally, guest
domains could gain information about other virtual machines running on
the same host or read arbitrary files on the host.

Workaround :

The CVEs listed below do not currently have fixes, but only apply to Xen
setups which have &ldquo
tmem&rdquo
specified on the hypervisor command line.
TMEM is not currently supported for use in production systems, and
administrators using tmem should disable it.
Relevant CVEs:
* CVE-2012-2497
* CVE-2012-6030
* CVE-2012-6031
* CVE-2012-6032
* CVE-2012-6033
* CVE-2012-6034
* CVE-2012-6035
* CVE-2012-6036

See also :

http://lists.xen.org/archives/html/xen-announce/2012-09/msg00006.html
http://www.gentoo.org/security/en/glsa/glsa-201309-24.xml

Solution :

All Xen users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-emulation/xen-4.2.2-r1'
All Xen-tools users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose
'>=app-emulation/xen-tools-4.2.2-r3'
All Xen-pvgrub users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose
'>=app-emulation/xen-pvgrub-4.2.2-r1'

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 8.1
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true