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Security Bulletins Digest
From: aleph1 () UNDERGROUND ORG (aleph1 () UNDERGROUND ORG)
Date: Thu, 8 Jul 1999 06:28:10 -0700


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Digest Name:  Daily Security Bulletins Digest
    Created:  Thu Jul  8  3:00:02 PDT 1999

Table of Contents:

Document ID      Title
---------------  -----------
HPSBUX9907-100   CDE Leaves Current Directory in root PATH

The documents are listed below.
-------------------------------------------------------------------------------


Document ID:  HPSBUX9907-100
Date Loaded:  19990707
      Title:  CDE Leaves Current Directory in root PATH

-------------------------------------------------------------------------
    HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #00100, 07 July 1999
-------------------------------------------------------------------------

The information in the following Security Bulletin should be acted upon
as soon as possible.  Hewlett-Packard Company will not be liable for any
consequences to any customer resulting from customer's failure to fully
implement instructions in this Security Bulletin as soon as possible.

-------------------------------------------------------------------------
PROBLEM:  The current directory is in the root user's PATH
          after logging in using CDE.

PLATFORM: HP 9000 series 700/800 at hp-ux revision 10.X

DAMAGE:  Increase in privledges.

SOLUTION: Modify /usr/dt/bin/Xsession until a patch is available.

AVAILABILITY:  This advisory will be updated when patches are available.

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

I.
   A. Background - The PATH environemnt variable is constructed from
      several sources including dtsearchpath and scripts in
      /etc/dt/config/Xsession.d/ and /usr/dt/config/Xsession.d/.
      The resulting PATH contains the string "::" which will be
      interpreted as the current directory.  The root user should
      not have the current directory in the PATH.

   B. Fixing the problem - Since the PATH environment variable can be
      affected by dtsearchpath and several scripts, the recommended
      solution is to clean up the root user's PATH after is has been
      created.

In /usr/dt/bin/Xsession just before this:

# ###########################################################################
#
#   Startup section.

Add this:

###################### Clean up $PATH for root ##########################
if [ "$USER" = "root" ]
then
  Log "Clean up PATH for root user"
  Log "Old PATH = $PATH"
  PATH=`echo $PATH | awk '
{
 # Remove elements from PATH that are
 #  (a)  "."
 #  (b)  ""
 #  (c)  blank
 #
   gsub (" ",":", $0) # Substitite ":" for each blank
   n = split ($0, path, ":")  # Split into elements with ":" as delimiter
   first = 1  # To suppress leading ":" in new PATH
   for (i=1; i<=n; i++) {
     len = length(path[i])
     dot = index(path[i], ".")
     dot_only = 0
     if ((len == 1) && (dot==1)) {
       dot_only = 1
     }
     # print element if it is not "" and not "."
     if (!(len==0) && !(dot_only==1)) {
       if(first != 1) {
         printf (":") # if not first element, print ":" in front
       }
       printf ("%s",path[i])
       first = 0
     }
  }
}
END { printf ("\n") }'`
Log "New PATH = $PATH"
fi
###################### End - Clean up $PATH for root ####################

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________________________________________________________________________
-----End of Document ID:  HPSBUX9907-100--------------------------------------


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