[ GLSA 200804-11 ] policyd-weight: Insecure temporary file creation

[Robert Buchholz <rbu () gentoo org>]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200804-11
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: policyd-weight: Insecure temporary file creation
      Date: April 11, 2008
      Bugs: #214403
        ID: 200804-11

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

policyd-weight uses temporary files in an insecure manner, allowing for
a symlink attack.

Background
==========

policyd-weight is a Perl policy daemon for the Postfix MTA intended to
eliminate forged envelope senders and HELOs.

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

    -------------------------------------------------------------------
     Package                     /   Vulnerable   /         Unaffected
    -------------------------------------------------------------------
  1  mail-filter/policyd-weight      < 0.1.14.17          >= 0.1.14.17

Description
===========

Chris Howells reported that policyd-weight creates and uses the
"/tmp/.policyd-weight/" directory in an insecure manner.

Impact
======

A local attacker could exploit this vulnerability to delete arbitrary
files or change the ownership to the "polw" user via symlink attacks.

Workaround
==========

Set "$LOCKPATH = '/var/run/policyd-weight/'" manually in
"/etc/policyd-weight.conf".

Resolution
==========

All policyd-weight users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot -v ">=mail-filter/policyd-weight-0.1.14.17"

This version changes the default path for sockets to
"/var/run/policyd-weight", which is only writable by a privileged user.
Users need to restart policyd-weight immediately after the upgrade due
to this change.

References
==========

  [ 1 ] CVE-2008-1569
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1569

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

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

  http://security.gentoo.org/glsa/glsa-200804-11.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 2008 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

Attachment: signature.asc
Description: This is a digitally signed message part.