bugtraq - [ GLSA 200511-23 ] chmlib, KchmViewer: Stack-based buffer overflow

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <CHILKAT-MID-4c4d5a49-df75-4f2b-9ccb-14853c1d3d7c@George_NewPC.Redsoft-2000.com>
Date: Mon, 28 Nov 2005 13:33:21 -0500
From: koon@...too.org
To: gentoo-announce@...ts.gentoo.org, bugtraq@...urityfocus.com,
	full-disclosure@...ts.grok.org.uk, security-alerts@...uxsecurity.com
Subject: [ GLSA 200511-23 ] chmlib,
	KchmViewer: Stack-based buffer overflow

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200511-23
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: chmlib, KchmViewer: Stack-based buffer overflow
      Date: November 28, 2005
      Bugs: #110557
        ID: 200511-23

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

chmlib and KchmViewer contain a buffer overflow vulnerability which may
lead to the execution of arbitrary code.

Background
==========

chmlib is a library for dealing with Microsoft ITSS and CHM format
files. KchmViewer is a CHM viewer that includes its own copy of the
chmlib library.

Affected packages
=================

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  app-doc/chmlib          < 0.37.4                        >= 0.37.4
  2  app-doc/kchmviewer        < 1.1                            >= 1.1
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
===========

Sven Tantau reported about a buffer overflow vulnerability in chmlib.
The function "_chm_decompress_block()" does not properly perform
boundary checking, resulting in a stack-based buffer overflow.

Impact
======

By convincing a user to open a specially crafted ITSS or CHM file,
using KchmViewer or a program makes use of chmlib, a remote attacker
could execute arbitrary code with the privileges of the user running
the software.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All chmlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-doc/chmlib-0.37.4"

All KchmViewer users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-doc/kchmviewer-1.1"

References
==========

  [ 1 ] CVE-2005-3318
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3318

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200511-23.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0

Download attachment "2#signature.asc" of type "application/octet-stream" (196 bytes)

View attachment "GWAVADAT.TXT" of type "text/plain" (39 bytes)

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/