GLSA 201309-24: Xen: Multiple vulnerabilities

Severity:	high
Title:	Xen: Multiple vulnerabilities
Date:	09/27/2013
Bugs:	#385319, #386371, #420875, #431156, #454314, #464724, #472214, #482860
ID:	201309-24

Synopsis

Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host.

Background

Xen is a bare-metal hypervisor.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-emulation/xen	< 4.2.2-r1	>= 4.2.2-r1	All supported architectures
app-emulation/xen-tools	< 4.2.2-r3	>= 4.2.2-r3	All supported architectures
app-emulation/xen-pvgrub	< 4.2.2-r1	>= 4.2.2-r1	All supported architectures

Description

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 “tmem” 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

Resolution

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"

References

• CVE-2011-2901
• CVE-2011-3262
• CVE-2012-0217
• CVE-2012-0218
• CVE-2012-2934
• CVE-2012-3432
• CVE-2012-3433
• CVE-2012-3494
• CVE-2012-3495
• CVE-2012-3496
• CVE-2012-3497
• CVE-2012-3498
• CVE-2012-3515
• CVE-2012-4411
• CVE-2012-4535
• CVE-2012-4536
• CVE-2012-4537
• CVE-2012-4538
• CVE-2012-4539
• CVE-2012-5510
• CVE-2012-5511
• CVE-2012-5512
• CVE-2012-5513
• CVE-2012-5514
• CVE-2012-5515
• CVE-2012-5525
• CVE-2012-5634
• CVE-2012-6030
• CVE-2012-6031
• CVE-2012-6032
• CVE-2012-6033
• CVE-2012-6034
• CVE-2012-6035
• CVE-2012-6036
• CVE-2012-6075
• CVE-2012-6333
• CVE-2013-0151
• CVE-2013-0152
• CVE-2013-0153
• CVE-2013-0154
• CVE-2013-0215
• CVE-2013-1432
• CVE-2013-1917
• CVE-2013-1918
• CVE-2013-1919
• CVE-2013-1920
• CVE-2013-1922
• CVE-2013-1952
• CVE-2013-1964
• CVE-2013-2076
• CVE-2013-2077
• CVE-2013-2078
• CVE-2013-2194
• CVE-2013-2195
• CVE-2013-2196
• CVE-2013-2211
• Xen TMEM

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201309-24.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.