Sicherheit: Mehrere Probleme in Xen

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SUSE Security Update: Security update for Xen
______________________________________________________________________________

Announcement ID: SUSE-SU-2012:0730-1
Rating: critical
References: #757537 #757970 #764077
Cross-References: CVE-2012-0217 CVE-2012-0218 CVE-2012-2934

Affected Products:
SUSE Linux Enterprise Software Development Kit 11 SP1
SUSE Linux Enterprise Server 11 SP1 for VMware
SUSE Linux Enterprise Server 11 SP1
SUSE Linux Enterprise Server 10 SP4
SUSE Linux Enterprise Server 10 SP3 LTSS
SUSE Linux Enterprise Server 10 SP2
SUSE Linux Enterprise Desktop 11 SP1
SUSE Linux Enterprise Desktop 10 SP4
SLE SDK 10 SP4
______________________________________________________________________________

An update that fixes three vulnerabilities is now available.

Description:

Three security issues were found in XEN.

Two security issues are fixed by this update:

*

CVE-2012-0217: Due to incorrect fault handling in the
XEN hypervisor it was possible for a XEN guest domain
administrator to execute code in the XEN host environment.

*

CVE-2012-0218: Also a guest user could crash the
guest XEN kernel due to a protection fault bounce.

The third fix is changing the Xen behaviour on certain
hardware:

*

CVE-2012-2934: The issue is a denial of service issue
on older pre-SVM AMD CPUs (AMD Erratum 121).

AMD Erratum #121 is described in "Revision Guide for
AMD Athlon 64 and AMD Opteron Processors":
http://support.amd.com/us/Processor_TechDocs/25759.pdf
<http://support.amd.com/us/Processor_TechDocs/25759.pdf>

The following 130nm and 90nm (DDR1-only) AMD
processors are subject to this erratum:

o

First-generation AMD-Opteron(tm) single and
dual core processors in either 939 or 940 packages:

+ AMD Opteron(tm) 100-Series Processors
+ AMD Opteron(tm) 200-Series Processors
+ AMD Opteron(tm) 800-Series Processors
+ AMD Athlon(tm) processors in either 754,
939 or 940 packages
+ AMD Sempron(tm) processor in either 754
or 939 packages
+ AMD Turion(tm) Mobile Technology in 754
package

This issue does not effect Intel processors.

The impact of this flaw is that a malicious PV guest
user can halt the host system.

As this is a hardware flaw, it is not fixable except
by upgrading your hardware to a newer revision, or not
allowing untrusted 64bit guestsystems.

The patch changes the behaviour of the host system
booting, which makes it unable to create guest machines
until a specific boot option is set.

There is a new XEN boot option "allow_unsafe" for
GRUB which allows the host to start guests again.

This is added to /boot/grub/menu.lst in the line
looking like this:

kernel /boot/xen.gz .... allow_unsafe

Note: .... in this example represents the existing
boot options for the host.

Security Issue references:

* CVE-2012-0217
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0217
>
* CVE-2012-0218
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0218
>
* CVE-2012-2934
<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-2934
>

Special Instructions and Notes:

Please reboot the system after installing this update.

Patch Instructions:

To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product:

- SUSE Linux Enterprise Software Development Kit 11 SP1:

zypper in -t patch sdksp1-xen-201206-6399

- SUSE Linux Enterprise Server 11 SP1 for VMware:

zypper in -t patch slessp1-xen-201206-6399

- SUSE Linux Enterprise Server 11 SP1:

zypper in -t patch slessp1-xen-201206-6399

- SUSE Linux Enterprise Desktop 11 SP1:

zypper in -t patch sledsp1-xen-201206-6399

To bring your system up-to-date, use "zypper patch".

Package List:

- SUSE Linux Enterprise Software Development Kit 11 SP1 (i586 x86_64):

xen-devel-4.0.3_21548_04-0.9.1

- SUSE Linux Enterprise Server 11 SP1 for VMware (i586 x86_64):

xen-kmp-trace-4.0.3_21548_04_2.6.32.59_0.5-0.9.1

- SUSE Linux Enterprise Server 11 SP1 (i586 x86_64):

xen-4.0.3_21548_04-0.9.1
xen-doc-html-4.0.3_21548_04-0.9.1
xen-doc-pdf-4.0.3_21548_04-0.9.1
xen-kmp-default-4.0.3_21548_04_2.6.32.59_0.5-0.9.1
xen-kmp-trace-4.0.3_21548_04_2.6.32.59_0.5-0.9.1
xen-libs-4.0.3_21548_04-0.9.1
xen-tools-4.0.3_21548_04-0.9.1
xen-tools-domU-4.0.3_21548_04-0.9.1

- SUSE Linux Enterprise Server 11 SP1 (i586):

xen-kmp-pae-4.0.3_21548_04_2.6.32.59_0.5-0.9.1

- SUSE Linux Enterprise Server 10 SP4 (i586 x86_64):

xen-3.2.3_17040_38-0.11.1
xen-devel-3.2.3_17040_38-0.11.1
xen-doc-html-3.2.3_17040_38-0.11.1
xen-doc-pdf-3.2.3_17040_38-0.11.1
xen-doc-ps-3.2.3_17040_38-0.11.1
xen-kmp-debug-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-default-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-kdump-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-smp-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-libs-3.2.3_17040_38-0.11.1
xen-tools-3.2.3_17040_38-0.11.1
xen-tools-domU-3.2.3_17040_38-0.11.1
xen-tools-ioemu-3.2.3_17040_38-0.11.1

- SUSE Linux Enterprise Server 10 SP4 (x86_64):

xen-libs-32bit-3.2.3_17040_38-0.11.1

- SUSE Linux Enterprise Server 10 SP4 (i586):

xen-kmp-bigsmp-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-kdumppae-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-vmi-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-vmipae-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1

- SUSE Linux Enterprise Server 10 SP3 LTSS (i586 x86_64):

xen-3.2.3_17040_28-0.6.11.1
xen-devel-3.2.3_17040_28-0.6.11.1
xen-doc-html-3.2.3_17040_28-0.6.11.1
xen-doc-pdf-3.2.3_17040_28-0.6.11.1
xen-doc-ps-3.2.3_17040_28-0.6.11.1
xen-kmp-debug-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-default-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-kdump-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-smp-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-libs-3.2.3_17040_28-0.6.11.1
xen-tools-3.2.3_17040_28-0.6.11.1
xen-tools-domU-3.2.3_17040_28-0.6.11.1
xen-tools-ioemu-3.2.3_17040_28-0.6.11.1

- SUSE Linux Enterprise Server 10 SP3 LTSS (x86_64):

xen-libs-32bit-3.2.3_17040_28-0.6.11.1

- SUSE Linux Enterprise Server 10 SP3 LTSS (i586):

xen-kmp-bigsmp-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-kdumppae-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-vmi-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1
xen-kmp-vmipae-3.2.3_17040_28_2.6.16.60_0.83.131-0.6.11.1

- SUSE Linux Enterprise Server 10 SP2 (i586 x86_64):

xen-3.2.0_16718_26-0.8.1
xen-devel-3.2.0_16718_26-0.8.1
xen-doc-html-3.2.0_16718_26-0.8.1
xen-doc-pdf-3.2.0_16718_26-0.8.1
xen-doc-ps-3.2.0_16718_26-0.8.1
xen-kmp-debug-3.2.0_16718_26_2.6.16.60_0.42.54.11-0.8.1
xen-kmp-default-3.2.0_16718_26_2.6.16.60_0.42.54.11-0.8.1
xen-kmp-kdump-3.2.0_16718_26_2.6.16.60_0.42.54.11-0.8.1
xen-kmp-smp-3.2.0_16718_26_2.6.16.60_0.42.54.11-0.8.1
xen-libs-3.2.0_16718_26-0.8.1
xen-tools-3.2.0_16718_26-0.8.1
xen-tools-domU-3.2.0_16718_26-0.8.1
xen-tools-ioemu-3.2.0_16718_26-0.8.1

- SUSE Linux Enterprise Server 10 SP2 (x86_64):

xen-libs-32bit-3.2.0_16718_26-0.8.1

- SUSE Linux Enterprise Server 10 SP2 (i586):

xen-kmp-bigsmp-3.2.0_16718_26_2.6.16.60_0.42.54.11-0.8.1

- SUSE Linux Enterprise Desktop 11 SP1 (i586 x86_64):

xen-4.0.3_21548_04-0.9.1
xen-kmp-default-4.0.3_21548_04_2.6.32.59_0.5-0.9.1
xen-libs-4.0.3_21548_04-0.9.1
xen-tools-4.0.3_21548_04-0.9.1
xen-tools-domU-4.0.3_21548_04-0.9.1

- SUSE Linux Enterprise Desktop 11 SP1 (i586):

xen-kmp-pae-4.0.3_21548_04_2.6.32.59_0.5-0.9.1

- SUSE Linux Enterprise Desktop 10 SP4 (i586 x86_64):

xen-3.2.3_17040_38-0.11.1
xen-devel-3.2.3_17040_38-0.11.1
xen-doc-html-3.2.3_17040_38-0.11.1
xen-doc-pdf-3.2.3_17040_38-0.11.1
xen-doc-ps-3.2.3_17040_38-0.11.1
xen-kmp-default-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-smp-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-libs-3.2.3_17040_38-0.11.1
xen-tools-3.2.3_17040_38-0.11.1
xen-tools-domU-3.2.3_17040_38-0.11.1
xen-tools-ioemu-3.2.3_17040_38-0.11.1

- SUSE Linux Enterprise Desktop 10 SP4 (x86_64):

xen-libs-32bit-3.2.3_17040_38-0.11.1

- SUSE Linux Enterprise Desktop 10 SP4 (i586):

xen-kmp-bigsmp-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1

- SLE SDK 10 SP4 (i586 x86_64):

xen-3.2.3_17040_38-0.11.1
xen-devel-3.2.3_17040_38-0.11.1
xen-kmp-debug-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-kmp-kdump-3.2.3_17040_38_2.6.16.60_0.97.1-0.11.1
xen-libs-3.2.3_17040_38-0.11.1
xen-tools-3.2.3_17040_38-0.11.1
xen-tools-ioemu-3.2.3_17040_38-0.11.1

- SLE SDK 10 SP4 (x86_64):

xen-libs-32bit-3.2.3_17040_38-0.11.1

References:

http://support.novell.com/security/cve/CVE-2012-0217.html
http://support.novell.com/security/cve/CVE-2012-0218.html
http://support.novell.com/security/cve/CVE-2012-2934.html
https://bugzilla.novell.com/757537
https://bugzilla.novell.com/757970
https://bugzilla.novell.com/764077
?keywords=1428153e4b377d6519b568fc4a847a50
?keywords=1fd339d2b48672edeccbed4bd3b9dd9d
?keywords=bbca71d17e042f39532a8e3060358202
?keywords=c25fa3090bc865a8836ebaff073cd9b6

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