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[RedHat] Schwachstellen in qspice - RHSA-2010:0633-01



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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

CVE-2010-0429 - Schwachstelle in libspice

  In der libspice Komponente von QEMU-KVM auf dem Host-System koennen
  bestimmte Speicherfunktionen auf Speicheradressen ausgefuehrt werden,
  die vom Gast-System kontrolliert werden. Ein priviligierter Gast-User
  kann diese Schwachstelle ausnutzen, um das Gast-System zum Absturz zu
  bringen (Denial-of-Service) oder moeglicher Weise um seine Rechte auf
  dem Host-System zu erweitern.

CVE-2010-0428 - Schwachstelle in libspice

  In der libspice Komponente von QEMU-KVM werden nicht nicht alle
  Pointer von dem Gast Systems QXL Grafikkartentreiber ueberprueft. Ein
  priviligierter Gast-User kann diese Schwachstelle mit falschen
  Pointern ausnutzen, um das Gast-System zum Absturz zu bringen
  (Denial-of-Service) oder moeglicher Weise um seine Rechte auf dem
  Host-System zu erweitern.


Betroffen sind die folgenden Software Pakete und Plattformen:

  Paket qspice

  RHEL Desktop Multi OS (v. 5 client) - x86_64
  RHEL Virtualization (v. 5 server) - x86_64
  


Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
	Torsten Voss

- --
 
Dipl.-Ing.(FH) Torsten Voss (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone  +49 40 808077-590
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.:  DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

Automatische Warnmeldungen               https://www.cert.dfn.de/autowarn

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: qspice security update
Advisory ID:       RHSA-2010:0633-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0633.html
Issue date:        2010-08-19
CVE Names:         CVE-2010-0428 CVE-2010-0429 
=====================================================================

1. Summary:

Updated qspice packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Multi OS (v. 5 client) - x86_64
RHEL Virtualization (v. 5 server) - x86_64

3. Description:

The Simple Protocol for Independent Computing Environments (SPICE) is a
remote display protocol used in Red Hat Enterprise Linux for viewing
virtualized guests running on the Kernel-based Virtual Machine (KVM)
hypervisor, or on Red Hat Enterprise Virtualization Hypervisor.

It was found that the libspice component of QEMU-KVM on the host did not
validate all pointers provided from a guest system's QXL graphics card
driver. A privileged guest user could use this flaw to cause the host to
dereference an invalid pointer, causing the guest to crash (denial of
service) or, possibly, resulting in the privileged guest user escalating
their privileges on the host. (CVE-2010-0428)

It was found that the libspice component of QEMU-KVM on the host could be
forced to perform certain memory management operations on memory addresses
controlled by a guest. A privileged guest user could use this flaw to crash
the guest (denial of service) or, possibly, escalate their privileges on
the host. (CVE-2010-0429)

All qspice users should upgrade to these updated packages, which contain
backported patches to correct these issues.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

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

568699 - CVE-2010-0428 libspice: Insufficient guest provided pointers validation
568701 - CVE-2010-0429 libspice: Relying on guest provided data structures to indicate memory allocation

6. Package List:

RHEL Desktop Multi OS (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/qspice-0.3.0-54.el5_5.2.src.rpm

x86_64:
qspice-0.3.0-54.el5_5.2.x86_64.rpm
qspice-debuginfo-0.3.0-54.el5_5.2.x86_64.rpm
qspice-libs-0.3.0-54.el5_5.2.x86_64.rpm
qspice-libs-devel-0.3.0-54.el5_5.2.x86_64.rpm

RHEL Virtualization (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/qspice-0.3.0-54.el5_5.2.src.rpm

x86_64:
qspice-0.3.0-54.el5_5.2.x86_64.rpm
qspice-debuginfo-0.3.0-54.el5_5.2.x86_64.rpm
qspice-libs-0.3.0-54.el5_5.2.x86_64.rpm
qspice-libs-devel-0.3.0-54.el5_5.2.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:

https://www.redhat.com/security/data/cve/CVE-2010-0428.html
https://www.redhat.com/security/data/cve/CVE-2010-0429.html
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@xxxxxxxxxx>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2010 Red Hat, Inc.
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