RHEL 4 : tk (RHSA-2008:0135)
Medium Nessus Plugin ID 31161
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionUpdated tk packages that fix a security issue are now available for Red Hat Enterprise Linux 4.
This update has been rated as having moderate security impact by the Red Hat Security Response Team.
[Updated 22 February 2008] The packages in this errata were originally pushed to the wrong Red Hat Network channels and were not available to all users. We have updated this errata with the correct channels.
Tk is a graphical toolkit for the Tcl scripting language.
An input validation flaw was discovered in Tk's GIF image handling. A code-size value read from a GIF image was not properly validated before being used, leading to a buffer overflow. A specially crafted GIF file could use this to cause a crash or, potentially, execute code with the privileges of the application using the Tk graphical toolkit.
A buffer overflow flaw was discovered in Tk's animated GIF image handling. An animated GIF containing an initial image smaller than subsequent images could cause a crash or, potentially, execute code with the privileges of the application using the Tk library.
All users are advised to upgrade to these updated packages which contain a backported patches to resolve these issues.
SolutionUpdate the affected tk and / or tk-devel packages.