Date: Fri, 01 Oct 2004 14:09:14 +0200
From: Thierry Carrez <koon@gentoo.org>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200410-01 ] sharutils: Buffer overflows in shar.c and unshar.c
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
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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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