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

Synopsis:          Moderate: tcl security and bug fix update
Advisory ID:       RHSA-2013:0122-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2013:0122.html
Issue date:        2013-01-08
CVE Names:         CVE-2007-4772 CVE-2007-6067 
====================================================================
1. Summary:

Updated tcl packages that fix two security issues and one bug are now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
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.

2. Relevant releases/architectures:

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

3. Description:

Tcl (Tool Command Language) provides a powerful platform for creating
integration applications that tie together diverse applications, protocols,
devices, and frameworks. When paired with the Tk toolkit, Tcl provides a
fast and powerful way to create cross-platform GUI applications.

Two denial of service flaws were found in the Tcl regular expression
handling engine. If Tcl or an application using Tcl processed a
specially-crafted regular expression, it would lead to excessive CPU and
memory consumption. (CVE-2007-4772, CVE-2007-6067)

This update also fixes the following bug:

* Due to a suboptimal implementation of threading in the current version of
the Tcl language interpreter, an attempt to use threads in combination with
fork in a Tcl script could cause the script to stop responding. At the
moment, it is not possible to rewrite the source code or drop support for
threading entirely. Consequent to this, this update provides a version of
Tcl without threading support in addition to the standard version with this
support. Users who need to use fork in their Tcl scripts and do not require
threading can now switch to the version without threading support by using
the alternatives command. (BZ#478961)

All users of Tcl are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.

4. 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. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

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

316511 - CVE-2007-4772 postgresql DoS via infinite loop in regex NFA optimization code
400931 - CVE-2007-6067 postgresql: tempory DoS caused by slow regex NFA cleanup
478961 - [RHEL5] tcl threads support implementation can cause scripts to hang

6. Package List:

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

Source:

i386:
tcl-8.4.13-6.el5.i386.rpm
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-html-8.4.13-6.el5.i386.rpm

x86_64:
tcl-8.4.13-6.el5.i386.rpm
tcl-8.4.13-6.el5.x86_64.rpm
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-debuginfo-8.4.13-6.el5.x86_64.rpm
tcl-html-8.4.13-6.el5.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:

i386:
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-devel-8.4.13-6.el5.i386.rpm

x86_64:
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-debuginfo-8.4.13-6.el5.x86_64.rpm
tcl-devel-8.4.13-6.el5.i386.rpm
tcl-devel-8.4.13-6.el5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:

i386:
tcl-8.4.13-6.el5.i386.rpm
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-devel-8.4.13-6.el5.i386.rpm
tcl-html-8.4.13-6.el5.i386.rpm

ia64:
tcl-8.4.13-6.el5.ia64.rpm
tcl-debuginfo-8.4.13-6.el5.ia64.rpm
tcl-devel-8.4.13-6.el5.ia64.rpm
tcl-html-8.4.13-6.el5.ia64.rpm

ppc:
tcl-8.4.13-6.el5.ppc.rpm
tcl-8.4.13-6.el5.ppc64.rpm
tcl-debuginfo-8.4.13-6.el5.ppc.rpm
tcl-debuginfo-8.4.13-6.el5.ppc64.rpm
tcl-devel-8.4.13-6.el5.ppc.rpm
tcl-devel-8.4.13-6.el5.ppc64.rpm
tcl-html-8.4.13-6.el5.ppc.rpm

s390x:
tcl-8.4.13-6.el5.s390.rpm
tcl-8.4.13-6.el5.s390x.rpm
tcl-debuginfo-8.4.13-6.el5.s390.rpm
tcl-debuginfo-8.4.13-6.el5.s390x.rpm
tcl-devel-8.4.13-6.el5.s390.rpm
tcl-devel-8.4.13-6.el5.s390x.rpm
tcl-html-8.4.13-6.el5.s390x.rpm

x86_64:
tcl-8.4.13-6.el5.i386.rpm
tcl-8.4.13-6.el5.x86_64.rpm
tcl-debuginfo-8.4.13-6.el5.i386.rpm
tcl-debuginfo-8.4.13-6.el5.x86_64.rpm
tcl-devel-8.4.13-6.el5.i386.rpm
tcl-devel-8.4.13-6.el5.x86_64.rpm
tcl-html-8.4.13-6.el5.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2007-4772.html
https://www.redhat.com/security/data/cve/CVE-2007-6067.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.