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Gentoo: GLSA-201309-24 High: Xen Code Execution and DoS Threats

gentoo
Calendar Grey September 27, 2013
Dist Gentoo Esm H88
CVE updates reveal serious flaws in Xen, risking unauthorized access and service disruptions on Gentoo systems. Prompt attention needed!
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

Summary

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

Topics%20covered

Topics Covered

security advisory high severity arbitrary code execution Denial of Service Gentoo Linux data access Xen

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

References

[ 1 ] CVE-2011-2901 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2901 [ 2 ] CVE-2011-3262 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3262 [ 3 ] CVE-2011-3262 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3262 [ 4 ] CVE-2012-0217 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0217 [ 5 ] CVE-2012-0218 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0218 [ 6 ] CVE-2012-2934 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2934 [ 7 ] CVE-2012-3432 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3432 [ 8 ] CVE-2012-3433 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3433 [ 9 ] CVE-2012-3494 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3494 [ 10 ] CVE-2012-3495 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3495 [ 11 ] CVE-2012-3496 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3496 [ 12 ] CVE-2012-3497 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-3497 [ 13 ] CVE-2012-3498 http://nvd.nist.gov/nvd.cfm?cvena...

Read the Full Advisory

Availability

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

Severity: High
Title: Xen: Multiple vulnerabilities
Date: September 27, 2013
Bugs: #385319, #386371, #420875, #431156, #454314, #464724,
ID: 201309-24

Topics%20covered

Topics Covered

security advisory high severity arbitrary code execution Denial of Service Gentoo Linux data access Xen

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.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-emulation/xen < 4.2.2-r1 >= 4.2.2-r1 2 app-emulation/xen-tools < 4.2.2-r3 >= 4.2.2-r3 3 app-emulation/xen-pvgrub < 4.2.2-r1 >= 4.2.2-r1 ------------------------------------------------------------------- 3 affected packages

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

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