RHSA-2013:1122 - Security Advisory

Topic

An updated rhev-guest-tools-iso package that fixes one security issue and
two 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.

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 Application Provisioning Tool (RHEV-APT) 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-2013-2176)

This issue was discovered by Jiri Belka of Red Hat.

This update also fixes the following bugs:

• In rare cases the format of the temporary directory location, as returned

by the Windows operating system, did not match the format expected by the
RHEV-Tools installer. Consequently, the install or upgrade failed with a
warning "Upgrade of RHEV-Tools on the Guest should be performed only when
running on RHEL 6 type Host (RHEV-H or RHEL). Upgrade aborted." This update
adds code to handle these exceptional cases, so RHEV-Tools can be
successfully installed or updated on Windows virtual machines. (BZ#979108)

• This release includes an updated Virtio-Serial driver and SPICE Agent.

(BZ#986904)

This rhev-guest-tools-iso package also contains a spice-vdagent-win bug fix
update (RHBA-2013:1107):
https://rhn.redhat.com/errata/RHBA-2013-1107.html

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 - 974267 - CVE-2013-2176 rhev-m: rhev-apt service unquoted search path
• BZ - 979108 - When trying to install or update RHEV-Tools on a Windows guest, the attempt fails with "Upgrade of RHEV-Tools on the Guest should be performed only when running on RHEL 6 type Host (RHEV-H or RHEL). Upgrade aborted."

CVEs

• CVE-2013-2176

References

• https://rhn.redhat.com/errata/RHBA-2013-1107.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