bugtraq - [LWSA-2010-001] Likewise Open 5.4 & 6.0

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Message-ID: <4C4DA784.9070404@likewise.com>
Date: Mon, 26 Jul 2010 08:19:32 -0700
From: Gerald Carter <gcarter@...ewise.com>
To: bugtraq@...urityfocus.com
Subject: [LWSA-2010-001] Likewise Open 5.4 & 6.0

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_____________________________________________________________

Likewise Security Advisory                      LWSA-2010-001
http://www.likewise.com/
_____________________________________________________________

Package     : Likewise Open
Service     : Likewise Security Authority (lsassd)
Date        : 26-July-2010
Platform(s) : Linux, OS X, Solaris, HP-UX, AIX, FreeBSD
Versions    : Likewise Open 5.4 (prior to build 8046)
              Likewise-CIFS 5.4 (prior to build 8046)
              Likewise Open 6.0 (prior to build 8234)
CVE(s)      : CVE-2010-0833
_____________________________________________________________

Summary:

  A logic flaw has been found in the pam_lsass library that,
  when run under the context of a root service (e.g. sshd,
  gdm, etc.), will allow any user to logon as a lsassd
  local-provider account (e.g. MACHINE\Administrator) if
  the account's password is marked as expired.  The cause
  is that the pam_lsass library uses SetPassword logic when
  detecting that the uid is 0 therefore not requiring
  that the intruder validate against the expired password
  before being allowed to specify a new password.

  All Likewise Open users are encouraged to upgrade to
  the latest released packages for their version or to
  to employ the stated workaround until such a time when
  an upgrade may be performed.

  This defect was first reported by Matt Weatherford from
  the University of Washington.  Our thanks to Matt for
  helping improve Likewise Open.
_____________________________________________________________

Workaround:

  Explicitly disabling the MACHINE\Administrator (or any
  other lsassd local-provider accounts not in use) will
  prevent unauthorized access.  This may be done by running
  the following command as the local superuser.  Replace
  <MACHINE> with the hostname of the local system

    $ lw-mod-user --disable-user "<MACHINE>\Administrator"

  You may verify that the account is disabled by running the
  lw-find-user-by-name command

    $ lw-find-user-by-name --level 2 "MACHINE\Administrator"
    ...
    Account disabled (or locked): TRUE
_____________________________________________________________

Updated Packages:

  New packages for both Likewise Open 5.4 and Likewise Open
  6.0 have been made available from

    http://www.likewise.com/products/likewise_open/
_____________________________________________________________
Likewise Security Team                  security@...ewise.com
http://www.likewise.com/
_____________________________________________________________

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