[ GLSA 200410-01 ] sharutils: Buffer overflows in shar.c and unshar.c

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200410-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: sharutils: Buffer overflows in shar.c and unshar.c
      Date: October 01, 2004
      Bugs: #65773
        ID: 200410-01

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Synopsis
========

sharutils contains two buffer overflow vulnerabilities that could lead
to arbitrary code execution.

Background
==========

sharutils contains utilities to manage shell archives.

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

    -------------------------------------------------------------------
     Package             /   Vulnerable   /                 Unaffected
    -------------------------------------------------------------------
  1  app-arch/sharutils      <= 4.2.1-r9                  >= 4.2.1-r10

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

sharutils contains two buffer overflows. Ulf Harnhammar discovered a
buffer overflow in shar.c, where the length of data returned by the wc
command is not checked. Florian Schilhabel discovered another buffer
overflow in unshar.c.

Impact
======

An attacker could exploit these vulnerabilities to execute arbitrary
code as the user running one of the sharutils programs.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All sharutils users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=app-arch/sharutils-4.2.1-r10"
    # emerge ">=app-arch/sharutils-4.2.1-r10"

References
==========

  [ 1 ] Debian Bug #265904
        http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=265904

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

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

  http://security.gentoo.org/glsa/glsa-200410-01.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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