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AUSCERT External Security Bulletin Redistribution
ESB-2013.0800
Important: rhev-guest-tools-iso & spice-vdagent-win security
and bug fix update
11 June 2013
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: rhev-guest-tools-iso
spice-vdagent-win
Publisher: Red Hat
Operating System: Windows
Impact/Access: Administrator Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2013-2152 CVE-2013-2151
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2013-0924.html
https://rhn.redhat.com/errata/RHSA-2013-0925.html
Comment: This bulletin contains two (2) Red Hat security advisories.
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Red Hat Security Advisory
Synopsis: Important: rhev-guest-tools-iso security and bug fix update
Advisory ID: RHSA-2013:0925-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0925.html
Issue date: 2013-06-10
CVE Names: CVE-2013-2151 CVE-2013-2152
=====================================================================
1. Summary:
An updated rhev-guest-tools-iso package that fixes two security issues and
two bugs is now available.
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:
RHEV-M 3.2 - noarch
3. Description:
The rhev-guest-tools-iso package contains tools and drivers. These tools
and drivers are required by supported Windows guest operating systems
when installed as guests on Red Hat Enterprise Virtualization.
An unquoted search path flaw was found in the way the Red Hat Enterprise
Virtualization agent was installed on Windows. Depending on the
permissions of the directories in the unquoted search path, a local,
unprivileged user could use this flaw to have a binary of their choosing
executed with SYSTEM privileges. (CVE-2013-2151)
An unquoted search path flaw was found in the way the SPICE service was
installed on Windows. Depending on the permissions of the directories in
the unquoted search path, a local, unprivileged user could use this flaw to
have a binary of their choosing executed with SYSTEM privileges.
(CVE-2013-2152)
This update also fixes the following bugs:
* Previously, when trying to uninstall rhev-guest-tools in Windows
Server 2003 (both 32-bit and 64-bit), an error event was created in the
event viewer saying "The BalloonService service hung on starting", even
though the package was uninstalled correctly. Now, the balloon service
executable is no longer registered meaning the service is no longer running
by default and rhev-guest-tools can be uninstalled without any error
messages. (BZ#860225, BZ#880278)
All Red Hat Enterprise Virtualization users are advised to upgrade to this
updated rhev-guest-tools-iso package, which resolves 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. Follow the upgrade
procedure in the Red Hat Enterprise Virtualization Installation Guide to
install these updated packages:
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Installation_Guide/chap-Upgrading_to_Red_Hat_Enterprise_Virtualization_3.2.html
To install the updated guest tools on individual guests using the image
provided by the rhev-guest-tools-iso package refer to:
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Administration_Guide/sect-Guest_Drivers_and_Agents.html
5. Bugs fixed (http://bugzilla.redhat.com/):
860225 - Uninstalling RHEV-Tools in Windows 2003-64bit version creates error event
962667 - [Windows Guest Tools] TypeError: encode() argument 1 must be string, not Non - 3.2.7 Guest Agent does not report data
971171 - CVE-2013-2151 rhevm: rhev agent service unquoted search path
971172 - CVE-2013-2152 rhevm: spice service unquoted search path
6. Package List:
RHEV-M 3.2:
noarch:
rhev-guest-tools-iso-3.2-8.noarch.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://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2013-2151.html
https://www.redhat.com/security/data/cve/CVE-2013-2152.html
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Installation_Guide/chap-Upgrading_to_Red_Hat_Enterprise_Virtualization_3.2.html
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Virtualization/3.2/html/Administration_Guide/sect-Guest_Drivers_and_Agents.html
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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Red Hat Security Advisory
Synopsis: Important: spice-vdagent-win security and bug fix update
Advisory ID: RHSA-2013:0924-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0924.html
Issue date: 2013-06-10
CVE Names: CVE-2013-2152
=====================================================================
1. Summary:
An update for spice-vdagent-win that fixes one security issue and several
bugs is now available.
The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.
2. Description:
spice-vdagent-win provides a service and an agent that can be installed and
run on Windows guests.
An unquoted search path flaw was found in the way the SPICE service was
installed on Windows. Depending on the permissions of the directories in
the unquoted search path, a local, unprivileged user could use this flaw to
have a binary of their choosing executed with SYSTEM privileges.
(CVE-2013-2152)
This update also fixes the following bugs:
* Previously, due to issues with some Windows guest applications, RHEV
SPICE agent stopped getting clipboard changes. Now, the agent uses a new
API that keeps track of clipboard changes, without the need to "trust" the
behavior of other applications registered to the clipboard. (BZ#919451)
* Previously, copying a .jpg or .png image file from specific applications,
such as Mozilla Firefox, on a Windows guest, then pasting into a Linux
client, resulted in an empty or black and white image due to incorrect
pallete encoding in the guest vdagent. Now, the encoding has been fixed and
copying and pasting works as expected. (BZ#919150)
* Previously, when using a Windows virtual machine, enabling extra monitors
with arbitrary configuration could fail. Now the agent enables the monitors
before updating it to an arbitrary resolution to solve this issue.
(BZ#922394)
* Previously, if SPICE was disconnected in the middle of copying and
pasting data from the client to the guest, copy and paste would stop
working after SPICE was reconnected. Now, the clipboard timeout has been
adjusted so that if SPICE is unexpectedly disconnected, the immediate copy
and paste action will fail, but subsequent attempts will be successful.
(BZ#833835)
* Previously, when attempting to connect multiple displays using a Windows
7 guest, remote-viewer would only show one display available, even when all
settings in the manager and on the SPICE client itself were correctly
configured. This was caused by a regression issue relating to changes to
custom resolution commands. Now, connecting and displaying multiple
monitors functions correctly. (BZ#922283)
* Previously, due to a regression caused by another patch, copying a .png
image from specific applications, such as Firefox, on a Linux client,
failed pasting into a Windows guest application, such as Paint, due to
incorrect pallete encoding in the guest vdagent. Now, the encoding has been
fixed and copying and pasting works as expected. (BZ#921980)
* Previously, when a second user logged into a Windows guest, the RHEV
SPICE Agent service terminated the previous vdagent instance, but
mistakenly also the newly created vdagent on the current active session.
Now, the vdagent termination event is reset after previous agent
termination, so each new agent is no longer terminated. (BZ#868254)
* Previously, if "RHEV SPICE agent" was stopped after copying data from a
Windows guest, the client was not correctly notified, and assumed it could
still paste the data. Now, agent termination has been fixed so that the
client is notified to release the clipboard. (BZ#903379)
3. Solution:
Red Hat Enterprise Virtualization users that are using SPICE to connect to
their virtual machines are advised to install this update.
4. Bugs fixed (http://bugzilla.redhat.com/):
833835 - copy-paste stops working after client disconnection during a copy-paste
868254 - vdagent-win exits if two users are logged in simultaneously
903379 - Stop the spice-vdagent on a Windows VM and the client right-click menu still shows you can paste with an empty clipboard.
922283 - win-vdagent: does not enable extra displays
922394 - --full-screen=auto-conf doesn't turn on disabled guest monitors
971172 - CVE-2013-2152 rhevm: spice service unquoted search path
5. References:
https://www.redhat.com/security/data/cve/CVE-2013-2152.html
https://access.redhat.com/security/updates/classification/#important
6. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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