5.307. spice-gtk

Updated spice-gtk packages that fix one security issue are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) associated with each description below.
The spice-gtk packages provide a GIMP Toolkit (GTK+) widget for SPICE (Simple Protocol for Independent Computing Environments) clients. Both Virtual Machine Manager and Virtual Machine Viewer can make use of this widget to access virtual machines using the SPICE protocol.

Security Fix

CVE-2012-4425
It was discovered that the spice-gtk setuid helper application, spice-client-glib-usb-acl-helper, did not clear the environment variables read by the libraries it uses. A local attacker could possibly use this flaw to escalate their privileges by setting specific environment variables before running the helper application.
Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for reporting this issue.
All users of spice-gtk are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.
Updated spice-gtk packages that fix multiple bugs and add various enhancements are now available for Red Hat Enterprise Linux 6.
The spice-gtk packages provide a GTK2 widget for SPICE clients. Both virt-manager and virt-viewer can make use of this widget to access virtual machines using the SPICE protocol.
The spice-gtk packages have been updated to upstream version 0.11, which fixes multiple bugs and adds multiple enhancements. These packages also add support for native USB redirection. (BZ#773642)

Bug Fixes

BZ#772118
Prior to this update, the spice-gtk client could abort unexpectedly when the audio system failed to initialize. This update ignores audio initialization failures so that spice-gtk also works with failed audio system initialization.
BZ#805641
Prior to this update, memory leaks could, under certain circumstances, occur when the guest resolution was changed. This update modifies the underlying code so that changing the resolution no longer causes memory leaks.
BZ#807389
Prior to this update, videos showed a blue tint when using guests hosted on a Red Hat Enterprise Linux 5.8 host. This update uses the correct color conversion also on older SPICE servers so that videos are now correctly tinted.
BZ#809145
Prior to this update, copying large amounts of text could cause a stack overflow. As a consequence SPICE clients that use the spice-gtk widget could abort with a segmentation fault. This update no longer allocates large amounts of data on the stack and large clipboard data can now be copied to the server.

Enhancement

BZ#758100
Prior to this update, the spice-gtk widget did not provide a native USB redirection. This update adds USB redirection support to spice-gtk.
All users of spice-gtk are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.