RHSA-2013:0925 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat Virtualization 3.2 x86_64

Fixes

• BZ - 860225 - Uninstalling RHEV-Tools in Windows 2003-64bit version creates error event
• BZ - 962667 - [Windows Guest Tools] TypeError: encode() argument 1 must be string, not Non - 3.2.7 Guest Agent does not report data
• BZ - 971171 - CVE-2013-2151 rhevm: rhev agent service unquoted search path
• BZ - 971172 - CVE-2013-2152 rhevm: spice service unquoted search path

CVEs

• CVE-2013-2152
• CVE-2013-2151

References

• 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