Scientific Linux Security Update : tcl on SL5.x i386/x86_64

Medium Nessus Plugin ID 63605


The remote Scientific Linux host is missing one or more security updates.


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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 63605

File Name: sl_20130108_tcl_on_SL5_x.nasl

Version: $Revision: 1.3 $

Type: local

Agent: unix

Published: 2013/01/17

Modified: 2016/12/14

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2013/01/08

Reference Information

CVE: CVE-2007-4772, CVE-2007-6067

CWE: 189, 399