Date: Tue, 11 Jan 2005 20:57:17 +0100
From: Thierry Carrez <koon@gentoo.org.>
To: gentoo-announce@lists.gentoo.org
Subject: [ GLSA 200501-22 ] poppassd_pam: Unauthorized password changing
X-Enigmail-Version: 0.89.5.0
X-Enigmail-Supports: pgp-inline, pgp-mime
Content-Type: multipart/signed; micalg=pgp-sha1;
protocol="application/pgp-signature";
boundary="------------enigCFFCB6C8C690A212C7D1C7F7"
X-Virus-Scanned: antivirus-gw at tyumen.ru
This is an OpenPGP/MIME signed message (RFC 2440 and 3156)
--------------enigCFFCB6C8C690A212C7D1C7F7
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200501-22
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: High
Title: poppassd_pam: Unauthorized password changing
Date: January 11, 2005
Bugs: #75820
ID: 200501-22
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
poppassd_pam allows anyone to change any user's password without
authenticating the user first.
Background
==========
poppassd_pam is a PAM-enabled server for changing system passwords that
can be used to change POP server passwords.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
net-mail/poppassd_ceti <= 1.0 >= 1.8.4
net-mail/poppassd_pam <= 1.0 Vulnerable!
-------------------------------------------------------------------
Description
===========
Gentoo Linux developer Marcus Hanwell discovered that poppassd_pam did
not check that the old password was valid before changing passwords.
Our investigation revealed that poppassd_pam did not call
pam_authenticate before calling pam_chauthtok.
Impact
======
A remote attacker could change the system password of any user,
including root. This leads to a complete compromise of the POP
accounts, and may also lead to a complete root compromise of the
affected server, if it also provides shell access authenticated using
system passwords.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All poppassd_pam users should migrate to the new package called
poppassd_ceti:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-mail/poppassd_ceti-1.8.4"
Note: Portage will automatically replace the poppassd_pam package by
the poppassd_ceti package.
References
==========
[ 1 ] CAN-2005-0002
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0002
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200501-22.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 2005 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/2.0
--------------enigCFFCB6C8C690A212C7D1C7F7
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFB5C+jvcL1obalX08RArvIAJ9ZOVPcvvmdT7oII63BXGf3hi887QCfTE6J
hQJ8vmqpcUFMHMYW7l+3DyE=
=j/cR
-----END PGP SIGNATURE-----
--------------enigCFFCB6C8C690A212C7D1C7F7--
