[37228] in bugtraq
[ GLSA 200411-09 ] shadow: Unauthorized modification of account information
daemon@ATHENA.MIT.EDU (Matthias Geerdsen)
Thu Nov 4 17:21:48 2004
Message-ID: <418A8F80.2040401@gentoo.org>
Date: Thu, 04 Nov 2004 21:22:24 +0100
From: Matthias Geerdsen <vorlon@gentoo.org>
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To: gentoo-announce@lists.gentoo.org
Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com,
security-alerts@linuxsecurity.com
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Gentoo Linux Security Advisory GLSA 200411-09
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http://security.gentoo.org/
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Severity: Low
Title: shadow: Unauthorized modification of account information
Date: November 04, 2004
Bugs: #69212
ID: 200411-09
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Synopsis
========
A flaw in the chfn and chsh utilities might allow modification of
account properties by unauthorized users.
Background
==========
shadow provides a set of utilities to deal with user accounts.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-apps/shadow < 4.0.5-r1 >= 4.0.5-r1
Description
===========
Martin Schulze reported a flaw in the passwd_check() function in
"libmisc/pwdcheck.c" which is used by chfn and chsh.
Impact
======
A local attacker may be able to use chfn and chsh to change the
standard shell of other users or modify their GECOS information (full
name, phone number...).
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All shadow users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.0.5-r1"
References
==========
[ 1 ] shadow NEWS file
http://ftp.pld.org.pl/software/shadow/NEWS
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200411-09.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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