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______________________________________________________________________________

      SCO Security Advisory

Subject:    OpenServer 5.0.6 OpenServer 5.0.7 : MMDF Various buffer overflows and other security issues
Advisory number:   SCOSA-2004.7
Issue date:     2004 July 14
Cross reference:   sr884728 fz528322 erg712434 CAN-2004-0510 CAN-2004-0511 CAN-2004-0512
______________________________________________________________________________


1. Problem Description

  Deprotect discovered a buffer overflow in execmail.  After reviewing 
  our code we determined the whole MMDF package needed a security audit.

  Various buffer overflows and other security issues that affect all 
  MMDF binaries have been corrected. 

  All but one of the MMDF binaries that were setuid root are no 
  longer setuid. 

  Additional changes in this version of MMDF are documented at
  ftp://ftp.sco.com/pub/openserver5/507/mp/mp3/osr507mp3.html#rn507mp_mmdf
  and in the updated man pages which are included in SCOSA-2004.7

  The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned MMDF buffer overflows the name CAN-2004-0510.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned MMDF null dereferences the name CAN-2004-0511.

  The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned MMDF core dumps the name CAN-2004-0512.

2. Vulnerable Supported Versions

  System      Binaries
  ----------------------------------------------------------------------
  OpenServer 5.0.6   MMDF Distribution
  OpenServer 5.0.7   MMDF Distribution

3. Solution

  The proper solution is to install the latest packages.

4. OpenServer 5.0.7

  4.1 Location of Fixed Binaries

  ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.7

  The fixes are also available in SCO OpenServer Release 5.0.7 
  Maintenance Pack 3 or later.  See
  http://www.sco.com/support/update/download/osr507list.html.

5. OpenServer 5.0.6   

  5.1 Location of Fixed Binaries

  ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2004.7

  5.2 Verification

  MD5 (VOL.000.000) = 7d079342022ff408e479184fab3ee86b

  md5 is available for download from
    ftp://ftp.sco.com/pub/security/tools

  5.3 Installing Fixed Binaries

  Upgrade the affected binaries with the following sequence:

  1) Download the VOL* files to a directory

  2) Run the custom command, specify an install from media
  images, and specify the download directory as the location of
  the images.


6. References

  Specific references for this advisory:
    http://www.deprotect.com/advisories/DEPROTECT-20040206.txt

  SCO security resources:
    http://www.sco.com/support/security/index.html

  SCO security advisories via email
    http://www.sco.com/support/forums/security.html

  This security fix closes SCO incidents sr884728 fz528322
  erg712434.


7. Disclaimer

  SCO is not responsible for the misuse of any of the information
  we provide on this website and/or through our security
  advisories. Our advisories are a service to our customers
  intended to promote secure installation and use of SCO
  products.


8. Acknowledgments

  SCO would like to thank Deprotect which describes itself 
  as "a Swedish based security company divided into four 
  divisions; Managed Security Services, Security Services, 
  Products and Development and our Security Academy."

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