Home / mailings [gentoo-announce] [ GLSA 201709-20 ] Postfix: Privilege escalation
Posted on 24 September 2017
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Gentoo Linux Security Advisory GLSA 201709-20
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https://security.gentoo.org/
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Severity: High
Title: Postfix: Privilege escalation
Date: September 24, 2017
Bugs: #621882
ID: 201709-20
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Synopsis
========
A vulnerability in Postfix may allow local users to gain root
privileges.
Background
==========
Postfix is a mail server and an alternative to the widely-used Sendmail
program.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 mail-mta/postfix < 3.1.6 >= 3.1.6
Description
===========
By default, Berkeley DB reads a DB_CONFIG configuration file from the
current working directory. This is an undocumented behavior.
Impact
======
A local attacker, by using a specially crafted DG_CONFIG file, could
possibly escalate privileges to the root group.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Postfix users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/postfix-3.1.6"
References
==========
[ 1 ] Postfix Official Announce
http://www.postfix.org/announcements/postfix-3.2.2.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201709-20
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 2017 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/2.5
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