Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

                          ESB-2007.0836 -- [Win]
               Lotus Notes Memory Mapped Files Vulnerability
                              24 October 2007


        AusCERT Security Bulletin Summary

Product:              Lotus Notes
                      Lotus Domino
Publisher:            Symantec
Operating System:     Windows
Impact:               Inappropriate Access
Access:               Existing Account
CVE Names:            CVE-2007-5544

Original Bulletin:  

- --------------------------BEGIN INCLUDED TEXT--------------------

Hash: SHA1

                     Symantec Vulnerability Research
                           Security Advisory

   Advisory ID: SYMSA-2007-013
Advisory Title: Lotus Notes Memory Mapped Files Vulnerability
        Author: Ollie Whitehouse / ollie_whitehouse@symantec.com
  Release Date: 23-10-2007
   Application: Lotus Notes / Domino
      Platform: Microsoft Windows
      Severity: Session hijacking in shared user environments
                / Data leakage in shared user environments
 Vendor status: Updated Application Versions Available
    CVE Number: CVE-2007-5544
     Reference: http://www.securityfocus.com/bid/26146


  Lotus Domino is a client/server product designed for collaborative
  working environments. Domino is designed for e-mail, scheduling,
  instant messaging and data driven applications.

  There exists a vulnerability in the way memory mapped files are
  used under Windows. The result of which is that if the Lotus Notes
  Client is used in a Microsoft Terminal Services or Citrix
  environment users can read each others Lotus Notes session data
  including items such as E-Mail.

  This vulnerability also impacts the server product.


  The vulnerability arises due to the mechanism used for
  Inter-Process Communication (IPC) between NLNOTES and NTASKLDR.
  IPC is performed via memory mapped files. When the files are
  created a NULL is passed to the ACL parameter resulting in EVERYONE
  being granted 'full-control'.

  The result of this is that an attacker can read the contents of
  any users Lotus Notes session when deployed in shared user
  environments such as Terminal Services or Citrix. The data which is
  accessible ranges from e-mail through to databases and associated
  Lotus Script.

  It should be noted that this vulnerability could also be used to
  write to the memory mapped files. The impact of which is that an
  attacker could potentially inject active content such as Lotus

Vendor Response:

  * Fixed for the Notes client with 6.5.6, 7.0.3 and 8.0
  * Fixed for the Domino server with 6.5.5 FP3, 6.5.6, 7.0.2
    FP1, 7.0.3, 8.0
  The fix requires that "SharedMemoryAllowOnly=1" be set in the
  notes.ini file. Additional details about the notes.ini variable
  is available in technote #1257030


  Update to a secure version of Notes client and Domino server.
  Implement the appropriate notes.ini fix.

Common Vulnerabilities and Exposures (CVE) Information:

The Common Vulnerabilities and Exposures (CVE) project has assigned
the following names to these issues.  These are candidates for
inclusion in the CVE list (http://cve.mitre.org), which standardizes
names for security problems.


- - -------Symantec Vulnerability Research Advisory Information-------

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- - -------------Symantec Product Advisory Information-------------

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

Copyright (c) 2007 by Symantec Corp.
Permission to redistribute this alert electronically is granted
as long as it is not edited in any way unless authorized by
Symantec Consulting Services. Reprinting the whole or part of
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The information in the advisory is believed to be accurate at the
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Version: GnuPG v1.4.7 (MingW32)


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