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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: tk security update
Advisory ID:       RHSA-2008:0136-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2008-0136.html
Issue date:        2008-02-21
CVE Names:         CVE-2008-0553 CVE-2007-5137 
=====================================================================

1. Summary:

Updated tk packages that fix a security issue are now available for Red Hat
Enterprise Linux 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

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.
(CVE-2008-0553)

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. (CVE-2007-5137)

All users are advised to upgrade to these updated packages which contain a
backported patches to resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.  

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188

5. Bugs fixed (http://bugzilla.redhat.com/):

290991 - CVE-2007-5137 Tk GIF processing buffer overflow
431518 - CVE-2008-0553 tk: GIF handling buffer overflow

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm

x86_64:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-8.4.13-5.el5_1.1.x86_64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm

x86_64:
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
tk-8.4.13-5.el5_1.1.src.rpm

i386:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm

ia64:
tk-8.4.13-5.el5_1.1.ia64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ia64.rpm
tk-devel-8.4.13-5.el5_1.1.ia64.rpm

ppc:
tk-8.4.13-5.el5_1.1.ppc.rpm
tk-8.4.13-5.el5_1.1.ppc64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ppc.rpm
tk-debuginfo-8.4.13-5.el5_1.1.ppc64.rpm
tk-devel-8.4.13-5.el5_1.1.ppc.rpm
tk-devel-8.4.13-5.el5_1.1.ppc64.rpm

s390x:
tk-8.4.13-5.el5_1.1.s390.rpm
tk-8.4.13-5.el5_1.1.s390x.rpm
tk-debuginfo-8.4.13-5.el5_1.1.s390.rpm
tk-debuginfo-8.4.13-5.el5_1.1.s390x.rpm
tk-devel-8.4.13-5.el5_1.1.s390.rpm
tk-devel-8.4.13-5.el5_1.1.s390x.rpm

x86_64:
tk-8.4.13-5.el5_1.1.i386.rpm
tk-8.4.13-5.el5_1.1.x86_64.rpm
tk-debuginfo-8.4.13-5.el5_1.1.i386.rpm
tk-debuginfo-8.4.13-5.el5_1.1.x86_64.rpm
tk-devel-8.4.13-5.el5_1.1.i386.rpm
tk-devel-8.4.13-5.el5_1.1.x86_64.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0553
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5137
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2008 Red Hat, Inc.
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