GLSA 201709-20: Postfix: Privilege escalation

Severity:high
Title:Postfix: Privilege escalation
Date:09/24/2017
Bugs: #621882
ID:201709-20

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

Package Vulnerable Unaffected Architecture(s)
mail-mta/postfix < 3.1.6 >= 3.1.6 All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201709-20.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 https://bugs.gentoo.org.

License

Copyright 2010 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.

Thank you!