[RHSA-2008:0892-01] Important: xen security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: xen security and bug fix update

Advisory ID: RHSA-2008:0892-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0892.html

Issue date: 2008-10-01

CVE Names: CVE-2008-1945 CVE-2008-1952

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1. Summary:

 

Updated xen packages that resolve a couple of security issues and fix a bug

are now available for Red Hat Enterprise Linux 5.

 

This update has been rated as having important security impact by the Red

Hat Security Response Team.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

RHEL Desktop Multi OS (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, x86_64

RHEL Virtualization (v. 5 server) - i386, ia64, x86_64

 

3. Description:

 

The xen packages contain tools for managing the virtual machine monitor in

Red Hat Virtualization.

 

It was discovered that the hypervisor's para-virtualized framebuffer (PVFB)

backend failed to validate the frontend's framebuffer description properly.

This could allow a privileged user in the unprivileged domain (DomU) to

cause a denial of service, or, possibly, elevate privileges to the

privileged domain (Dom0). (CVE-2008-1952)

 

A flaw was found in the QEMU block format auto-detection, when running

fully-virtualized guests and using Qemu images written on removable media

(USB storage, 3.5" disks). Privileged users of such fully-virtualized

guests (DomU), with a raw-formatted disk image, were able to write a header

to that disk image describing another format. This could allow such guests

to read arbitrary files in their hypervisor's host (Dom0). (CVE-2008-1945)

 

Additionally, the following bug is addressed in this update:

 

* The qcow-create command terminated when invoked due to glibc bounds

checking on the realpath() function.

 

Users of xen are advised to upgrade to these updated packages, which

resolve these security issues and fix this bug.

 

4. Solution:

 

Before applying this update, make sure that all previously-released

errata relevant to your system have been applied.

 

This update is available via Red Hat Network. Details on how to use

the Red Hat Network to apply this update are available at

http://kbase.redhat.com/faq/FAQ_58_10188

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

445844 - CVE-2008-1945 qemu/kvm/xen: add image format options for USB storage and removable media

447759 - CVE-2008-1952 qemu/xen/kvm: ioemu: Fix PVFB backend to limit frame buffer size

454651 - xen: buffer overflow detected: qcow-create terminated

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-64.el5_2.3.src.rpm

 

i386:

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-libs-3.0.3-64.el5_2.3.i386.rpm

 

x86_64:

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.x86_64.rpm

xen-libs-3.0.3-64.el5_2.3.i386.rpm

xen-libs-3.0.3-64.el5_2.3.x86_64.rpm

 

RHEL Desktop Multi OS (v. 5 client):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-64.el5_2.3.src.rpm

 

i386:

xen-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-devel-3.0.3-64.el5_2.3.i386.rpm

 

x86_64:

xen-3.0.3-64.el5_2.3.x86_64.rpm

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.x86_64.rpm

xen-devel-3.0.3-64.el5_2.3.i386.rpm

xen-devel-3.0.3-64.el5_2.3.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-64.el5_2.3.src.rpm

 

i386:

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-libs-3.0.3-64.el5_2.3.i386.rpm

 

ia64:

xen-debuginfo-3.0.3-64.el5_2.3.ia64.rpm

xen-libs-3.0.3-64.el5_2.3.ia64.rpm

 

x86_64:

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.x86_64.rpm

xen-libs-3.0.3-64.el5_2.3.i386.rpm

xen-libs-3.0.3-64.el5_2.3.x86_64.rpm

 

RHEL Virtualization (v. 5 server):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-64.el5_2.3.src.rpm

 

i386:

xen-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-devel-3.0.3-64.el5_2.3.i386.rpm

 

ia64:

xen-3.0.3-64.el5_2.3.ia64.rpm

xen-debuginfo-3.0.3-64.el5_2.3.ia64.rpm

xen-devel-3.0.3-64.el5_2.3.ia64.rpm

 

x86_64:

xen-3.0.3-64.el5_2.3.x86_64.rpm

xen-debuginfo-3.0.3-64.el5_2.3.i386.rpm

xen-debuginfo-3.0.3-64.el5_2.3.x86_64.rpm

xen-devel-3.0.3-64.el5_2.3.i386.rpm

xen-devel-3.0.3-64.el5_2.3.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://www.redhat.com/security/team/key/#package

 

7. References:

 

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1945

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1952

http://www.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://www.redhat.com/security/team/contact/

 

Copyright 2008 Red Hat, Inc.

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