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

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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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 () gentoo 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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