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Gentoo Linux Security Advisory                           GLSA 200812-16
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: Dovecot: Multiple vulnerabilities
      Date: December 14, 2008
      Bugs: #240409, #244962, #245316
        ID: 200812-16

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Synopsis
=======
Multiple vulnerabilities were found in the Dovecot mailserver.

Background
=========
Dovecot is an IMAP and POP3 server written with security primarily in
mind.

Affected packages
================
    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  net-mail/dovecot     < 1.1.7-r1                       >= 1.1.7-r1

Description
==========
Several vulnerabilities were found in Dovecot:

* The "k" right in the acl_plugin does not work as expected
  (CVE-2008-4577, CVE-2008-4578)

* The dovecot.conf is world-readable, providing improper protection
  for the ssl_key_password setting (CVE-2008-4870)

* A permanent Denial of Service with broken mail headers is possible
  (CVE-2008-4907)

Impact
=====
These vulnerabilities might allow a remote attacker to cause a Denial
of Service, to circumvent security restrictions or allow local
attackers to disclose the passphrase of the SSL private key.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Dovecot users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/dovecot-1.1.7-r1"

Users should be aware that dovecot.conf will still be world-readable
after the update. If employing ssl_key_password, it should not be used
in dovecot.conf but in a separate file which should be included with
"include_try".

References
=========
  [ 1 ] CVE-2008-4577
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4577
  [ 2 ] CVE-2008-4578
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4578
  [ 3 ] CVE-2008-4870
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4870
  [ 4 ] CVE-2008-4907
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4907

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

  https://security.gentoo.org/glsa/200812-16

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 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.

https://creativecommons.org/licenses/by-sa/2.5/