Issued:

2013-01-08

Updated:

2013-01-08

RHSA-2013:0122 - Moderate: tcl security and bug fix update

Synopsis

Moderate: tcl security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

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.

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.

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

Affected Products

Updated Packages

• tcl-debuginfo-8.4.13-6.el5.ppc.rpm
• tcl-8.4.13-6.el5.x86_64.rpm
• tcl-debuginfo-8.4.13-6.el5.s390x.rpm
• tcl-8.4.13-6.el5.ppc.rpm
• tcl-html-8.4.13-6.el5.x86_64.rpm
• tcl-devel-8.4.13-6.el5.ppc64.rpm
• tcl-html-8.4.13-6.el5.ppc.rpm
• tcl-8.4.13-6.el5.s390x.rpm
• tcl-devel-8.4.13-6.el5.ppc.rpm
• tcl-html-8.4.13-6.el5.s390x.rpm
• tcl-debuginfo-8.4.13-6.el5.x86_64.rpm
• tcl-8.4.13-6.el5.s390.rpm
• tcl-debuginfo-8.4.13-6.el5.ia64.rpm
• tcl-devel-8.4.13-6.el5.ia64.rpm
• tcl-devel-8.4.13-6.el5.s390x.rpm
• tcl-8.4.13-6.el5.i386.rpm
• tcl-devel-8.4.13-6.el5.x86_64.rpm
• tcl-debuginfo-8.4.13-6.el5.s390.rpm
• tcl-devel-8.4.13-6.el5.i386.rpm
• tcl-html-8.4.13-6.el5.i386.rpm
• tcl-8.4.13-6.el5.ia64.rpm
• tcl-8.4.13-6.el5.src.rpm
• tcl-devel-8.4.13-6.el5.s390.rpm
• tcl-html-8.4.13-6.el5.ia64.rpm
• tcl-debuginfo-8.4.13-6.el5.i386.rpm
• tcl-8.4.13-6.el5.ppc64.rpm
• tcl-debuginfo-8.4.13-6.el5.ppc64.rpm

Fixes

• This content is not included.BZ - 316511
• This content is not included.BZ - 400931
• This content is not included.BZ - 478961

CVEs

• CVE-2007-6067
• CVE-2007-4772

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.