Red Hat Security Advisory: tcl security and bug fix update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2013:0122 Final 1 1 2013-01-08T04:08:00Z Current version 2013-01-08T04:08:00Z 2013-01-08T04:08:00Z Red Hat rhsa-to-cvrf 1.0.1484 2013-01-08T04:50:02Z 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. 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. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2013 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2013-0122.html https://rhn.redhat.com/errata/RHSA-2013-0122.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate https://bugzilla.redhat.com/show_bug.cgi?id=478961 https://bugzilla.redhat.com/show_bug.cgi?id=478961 Red Hat Enterprise Linux Desktop (v. 5 client) RHEL Desktop Workstation (v. 5 client) Red Hat Enterprise Linux (v. 5 server) tcl-8.4.13-6.el5.src.rpm tcl-8.4.13-6.el5 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) tcl-8.4.13-6.el5 as a component of RHEL Desktop Workstation (v. 5 client) tcl-8.4.13-6.el5 as a component of Red Hat Enterprise Linux (v. 5 server) 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. 2007-09-27T00:00:00Z 2008-01-07T00:00:00Z CVE-2007-4772 5Client-Workstation:tcl-8.4.13-6.el5 5Client:tcl-8.4.13-6.el5 5Server:tcl-8.4.13-6.el5 Moderate 1.5 AV:L/AC:M/Au:S/C:N/I:N/A:P 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 https://rhn.redhat.com/errata/RHSA-2013-0122.html https://www.redhat.com/security/data/cve/CVE-2007-4772.html CVE-2007-4772 https://bugzilla.redhat.com/show_bug.cgi?id=316511 bz#316511: CVE-2007-4772 postgresql DoS via infinite loop in regex NFA optimization code 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. 2007-10-09T00:00:00Z 2008-01-07T00:00:00Z CVE-2007-6067 5Client-Workstation:tcl-8.4.13-6.el5 5Client:tcl-8.4.13-6.el5 5Server:tcl-8.4.13-6.el5 Low 1.5 AV:L/AC:M/Au:S/C:N/I:N/A:P 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 https://rhn.redhat.com/errata/RHSA-2013-0122.html https://www.redhat.com/security/data/cve/CVE-2007-6067.html CVE-2007-6067 https://bugzilla.redhat.com/show_bug.cgi?id=400931 bz#400931: CVE-2007-6067 postgresql: tempory DoS caused by slow regex NFA cleanup