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Gentoo Linux Security Advisory                           GLSA 200410-01
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                                            https://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
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

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

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
https://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.

https://creativecommons.org/licenses/by-sa/1.0/