[Full-disclosure] [ GLSA 200511-10 ] RAR: Format string and buffer overflow vulnerabilities

[Thierry Carrez]

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Gentoo Linux Security Advisory                           GLSA 200511-10
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: RAR: Format string and buffer overflow vulnerabilities
      Date: November 13, 2005
      Bugs: #111926
        ID: 200511-10

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Synopsis
========

RAR contains a format string error and a buffer overflow vulnerability
that may be used to execute arbitrary code.

Background
==========

RAR is a powerful archive manager that can decompress RAR, ZIP and
other files, and can create new archives in RAR and ZIP file format.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  app-arch/rar       < 3.5.1                               >= 3.5.1

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

Tan Chew Keong reported about two vulnerabilities found in RAR:

* A format string error exists when displaying a diagnostic error
  message that informs the user of an invalid filename in an UUE/XXE
  encoded file.

* Some boundary errors in the processing of malicious ACE archives
  can be exploited to cause a buffer overflow.

Impact
======

A remote attacker could exploit these vulnerabilities by enticing a
user to:

* decode a specially crafted UUE/XXE file, or

* extract a malicious ACE archive containing a file with an overly
  long filename.

When the user performs these actions, the arbitrary code of the
attacker's choice will be executed.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All RAR users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/rar-3.5.1"

References
==========

  [ 1 ] RAR Release Notes
        http://www.rarlabs.com/rarnew.htm
  [ 2 ] Secunia Research 11/10/2005
        http://secunia.com/secunia_research/2005-53/advisory/

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

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

  http://security.gentoo.org/glsa/glsa-200511-10.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 at gentoo.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

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