Scientific Linux SL5.x Security Update: Moderate Tclr DoS Issues

Date: Wed, 16 Jan 2013 16:10:11 -0600
Reply-To: Pat Riehecky 
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Organization: Fermilab
Subject: Security ERRATA Moderate: tcl on SL5.x i386/x86_64
MIME-Version: 1.0

Synopsis: Moderate: tcl security and bug fix update
Issue Date: 2013-01-08
CVE Numbers: CVE-2007-4772
 CVE-2007-6067
--

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.
--

SL5
 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
 tcl-devel-8.4.13-6.el5.i386.rpm
 tcl-devel-8.4.13-6.el5.x86_64.rpm
 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
 tcl-devel-8.4.13-6.el5.i386.rpm

- Scientific Linux Development Team