GLSA 200502-30: cmd5checkpw: Local password leak vulnerability
Posted on: 02/25/2005 05:23 PM

A cmd5checkpw security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200502-30
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http://security.gentoo.org/
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Severity: Low
Title: cmd5checkpw: Local password leak vulnerability
Date: February 25, 2005
Bugs: #78256
ID: 200502-30

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Synopsis
=======

cmd5checkpw contains a flaw allowing local users to access other users cmd5checkpw passwords.

Background
=========

cmd5checkpw is a checkpassword compatible authentication program that uses CRAM-MD5 authentication mode.

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

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Package / Vulnerable / Unaffected
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1 net-mail/cmd5checkpw lt;= 0.22-r1 gt;= 0.22-r2

Description
==========

Florian Westphal discovered that cmd5checkpw is installed setuid cmd5checkpw but does not drop privileges before calling execvp(), so the invoked program retains the cmd5checkpw euid.

Impact
=====

Local users that know at least one valid /etc/poppasswd user/password combination can read the /etc/poppasswd file.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All cmd5checkpw users should upgrade to the latest available version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-mail/cmd5checkpw-0.22-r2"

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

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

http://security.gentoo.org/glsa/glsa-200502-30.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 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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