full-disclosure - [ GLSA 200408-14 ] acroread: UUDecode filename buffer overflow

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From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200408-14 ] acroread: UUDecode filename buffer overflow

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Gentoo Linux Security Advisory                           GLSA 200408-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: acroread: UUDecode filename buffer overflow
      Date: August 15, 2004
      Bugs: #60205
        ID: 200408-14

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Synopsis
========

acroread contains two errors in the handling of UUEncoded filenames
that may lead to execution of arbitrary code or programs.

Background
==========

acroread is Adobe's Acrobat PDF reader for Linux.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  app-text/acroread       <= 5.08                           >= 5.09

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

acroread contains two errors in the handling of UUEncoded filenames.
First, it fails to check the length of a filename before copying it
into a fixed size buffer and, secondly, it fails to check for the
backtick shell metacharacter in the filename before executing a command
with a shell.

Impact
======

By enticing a user to open a PDF with a specially crafted filename, an
attacker could execute arbitrary code or programs with the permissions
of the user running acroread.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of acroread.

Resolution
==========

All acroread users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=app-text/acroread-5.09"
    # emerge ">=app-text/acroread-5.09"

References
==========

  [ 1 ] iDEFENSE Advisory 125
        http://idefense.com/application/poi/display?id=125&type=vulnerabilities
  [ 2 ] iDEFENSE Advisory 126
        http://idefense.com/application/poi/display?id=126&type=vulnerabilities

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

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

    http://security.gentoo.org/glsa/glsa-200408-14.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 2004 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/1.0
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