Secure testing team - Jul 2010 - Bug#588090: heap corruption overrun in bogofilter/bogolexer

Package: bogofilter
Severity: grave
Tags: security

The following security issue was found in bogofilter:

bogofilter-SA-2010-01

Topic:          heap corruption overrun in bogofilter/bogolexer

Announcement:   bogofilter-SA-2010-01
Writer:         Matthias Andree
Version:        0.1
CVE ID:
Announced:
Category:       vulnerability
Type:           array index underflow/out of bounds write through invalid input
Impact:         heap corruption, application crash
Credits:        Julius Plenz
Danger:         medium
URL:            http://bogofilter.sourceforge.net/security/bogofilter-SA-2010-01

Affected:       bogofilter <= 1.2.1
                SVN before 2010-07-03 08:40 UTC

Not affected:   bogofilter 1.2.2            (to be released)

1. Background
============
Bogofilter is a software package for classifying a message as spam or
non-spam.  It uses a data base to store words and must be trained
which messages are spam and non-spam. It uses the probabilities of
individual words for classifying the message.

Note that the bogofilter project is issuing security announcements only
for current "stable" releases, and not necessarily for past
"stable"
releases.

2. Problem description
=====================
Bogofilter''s/bogolexer''s base64 could overwrite memory before
its heap
buffer if the base64 input started with an equals sign, such as through
misdeclaration of quoted-printable as base64.

3. Impact
========
Vulnerable bogofilter and bogolexer applications can corrupt their heap and
crash. The consequences are dependent on the local configuration, memory
layout and operating system features.

4. Solution
==========
Upgrade your bogofilter to version 1.2.2 (or a newer release).

bogofilter is available from SourceForge:

<https://sourceforge.net/project/showfiles.php?group_id=62265>

A. Copyright, License and Warranty
=================================
(C) Copyright 2010 by Matthias Andree, <matthias.andree at gmx.de>.
Some rights reserved.

This work is licenced under the Creative Commons
Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy
of this licence, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
or send a letter to Creative Commons, 171 Second Street, Suite 300, San
Francisco, California 94105, USA.

THIS WORK IS PROVIDED FREE OF CHARGE AND WITHOUT ANY WARRANTIES.
Use the information herein at your own risk.

END of bogofilter-SA-2010-01




-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, ''unstable'')
Architecture: i386 (i686)

Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=de_DE.ISO-8859-15 at euro (charmap=ISO-8859-15)
Shell: /bin/sh linked to /bin/bash

Versions of packages bogofilter depends on:
pn  bogofilter-bdb                <none>     (no description available)

bogofilter recommends no packages.

bogofilter suggests no packages.