[ GLSA 200701-13 ] Fetchmail: Denial of Service and password disclosure

[Matthias Geerdsen <vorlon () gentoo org>]

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200701-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: Normal
     Title: Fetchmail: Denial of Service and password disclosure
      Date: January 22, 2007
      Bugs: #160463
        ID: 200701-13

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

Synopsis
========

Fetchmail has been found to have numerous vulnerabilities allowing for
Denial of Service and password disclosure.

Background
==========

Fetchmail is a remote mail retrieval and forwarding utility.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  net-mail/fetchmail       < 6.3.6                         >= 6.3.6

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

Neil Hoggarth has discovered that when delivering messages to a message
delivery agent by means of the "mda" option, Fetchmail passes a NULL
pointer to the ferror() and fflush() functions when refusing a message.
Isaac Wilcox has discovered numerous means of plain-text password
disclosure due to errors in secure connection establishment.

Impact
======

An attacker could deliver a message via Fetchmail to a message delivery
agent configured to refuse the message, and crash the Fetchmail
process. SMTP and LMTP delivery modes are not affected by this
vulnerability. An attacker could also perform a Man-in-the-Middle
attack, and obtain plain-text authentication credentials of users
connecting to a Fetchmail process.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All fetchmail users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/fetchmail-6.3.6"

References
==========

  [ 1 ] CVE-2006-5867
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5867
  [ 2 ] CVE-2006-5974
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5974

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

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

  http://security.gentoo.org/glsa/glsa-200701-13.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 2007 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: OpenPGP digital signature