[ GLSA 201709-20 ] Postfix

[GLSA]

Gentoo Linux Security Advisory

Title: Postfix: Privilege escalation (GLSA 201709-20)
Severity: high
Exploitable: local
Date: 2017-09-24
Bug(s): #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: mail-mta/postfix
Vulnerable: < 3.1.6
Unaffected: >= 3.1.6
Architectures: 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: