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Gentoo Linux Security Advisory GLSA 200409-32
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http://security.gentoo.org/
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Severity: High
Title: getmail: Filesystem overwrite vulnerability
Date: September 23, 2004
Bugs: #64643
ID: 200409-32
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Synopsis
========
getmail contains a vulnerability that could potentially allow any local
user to create or overwrite files in any directory on the system. This
flaw can be escalated further and possibly lead to a complete system
compromise.
Background
==========
getmail is a reliable fetchmail replacement that supports Maildir,
Mboxrd and external MDA delivery.
Affected packages
=================
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Package / Vulnerable / Unaffected
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1 net-mail/getmail < 4.2.0 >= 4.2.0
Description
===========
David Watson discovered a vulnerability in getmail when it is
configured to run as root and deliver mail to the maildirs/mbox files
of untrusted local users. A malicious local user can then exploit a
race condition, or a similar symlink attack, and potentially cause
getmail to create or overwrite files in any directory on the system.
Impact
======
An untrusted local user could potentially create or overwrite files in
any directory on the system. This vulnerability may also be exploited
to have arbitrary commands executed as root.
Workaround
==========
Do not run getmail as a privileged user; or, in version 4, use an
external MDA with explicitly configured user and group privileges.
Resolution
==========
All getmail users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-mail/getmail-4.2.0"
# emerge ">=net-mail/getmail-4.2.0"
References
==========
[ 1 ] getmail ChangeLog
http://www.qcc.ca/~charlesc/software/getmail-4/CHANGELOG
[ 2 ] getmail Mailing List
http://article.gmane.org/gmane.mail.getmail.user/1430
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200409-32.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@xxxxxxxxxx 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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