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______________________________________________________________________________

       SCO Security Advisory

Subject:    OpenServer 6.0.0 : RPCBind Remote Denial of Service Vulnerability
Advisory number:   SCOSA-2005.43
Issue date:     2005 October 27
Cross reference:  sr895067 erg712957 fz533036 CAN-2005-2132
______________________________________________________________________________


1. Problem Description

   When the RPC portmapper (rpcbind) receives an invalid portmap
   request from a remote (or local) host, it falls into a denial
   of service state and cannot respond. As a result, the RPC
   services will not operate normally.

   The Common Vulnerabilities and Exposures project (cve.mitre.org)
   has assigned the name CAN-2005-2132 to this issue.


2. Vulnerable Supported Versions

   System        Binaries
   ----------------------------------------------------------------------
   OpenServer 6.0.0    /usr/lib/libnsl.so.1


3. Solution

   The proper solution is to install the latest packages.


4. OpenServer 6.0.0

   4.1 Location of Fixed Binaries

   ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2005.43


   4.2 Verification

   MD5 (VOL.000.000) = 5086254532a3d202f526de0b6d343e66

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


   4.3 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 directory as the location of the
   images.


5. References

   Specific references for this advisory:
     http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2132

   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 sr895067 erg712957 fz533036.


6. 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.


7. Acknowledgments

   The SCO Group would like to thank Yun Jonglim for his work
   in discovering and describing this defect so well.

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