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    Caldera International, Inc.  Security Advisory

Subject:    OpenServer 5.0.5 : sar -o buffer overflow
Advisory number:   CSSA-2002-SCO.17
Issue date:     2002 May 01
Cross reference:
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1. Problem Description

  If the /usr/bin/sar command is given an exceedingly long
  argument to the o option, it will memory fault. This could
  allow a malicious user to elevate their permissions.


2. Vulnerable Supported Versions

  System        Binary
  ----------------------------------------------------------------------
  OpenServer 5.0.5    /usr/bin/sar
          /usr/lib/sa/sadc
          /usr/bin/cpusar
          /usr/bin/mpsar

3. Solution

  The proper solution is to install the latest packages.


4. OpenServer 5.0.5

  4.1 Location of Fixed Binaries

  ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.17


  4.2 Verification

  MD5 (VOL.000.000) = f912fe801263863956c257c4ef395570

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


  4.3 Installing Fixed Binaries

  Upgrade the affected binaries with the following commands:

  1) Download the VOL* files to the /tmp directory

  Run the custom command, specify an install from media images,
  and specify the /tmp directory as the location of the images.


5. References

  Specific references for this advisory:
    none

  Caldera UNIX security resources:
    http://stage.caldera.com/support/security/

  Caldera OpenLinux security resources:
    http://www.caldera.com/support/security/index.html

  This security fix closes Caldera incidents sr862424, fz520480,
  erg712003.


6. Disclaimer

  Caldera International, Inc. 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 Caldera products.


7. Acknowledgements

  Caldera would like to thank KF <dotslash@snosoft.com> for
  discovering this problem, researching it, and alerting us.
  And being patient, too.

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