Description:

Oracle Corporation Released CVE-2012-1675 on May 5th, 2012 in regards to a vulnerability in their software.
This vulnerability specifically targets a component known as the TNS Listener. The TNS Listener, as used in current
Oracle Database versions distributed with the CA eHealth product, 10g 10.2.0.3, 10.2.0.4, and 10.2.0.5, allows remote attackers to execute arbitrary database commands by performing a remote registration of a database (1) instance or (2) service name that already exists, then conducting a man-in-the-middle (MITM) attack to hijack database connections, aka "TNS Poison.". The listed CA eHealth versions have, after review by CA Sustaining Engineering, been determined to be vulnerable, and the following Oracle approved work around is being offered to customers for all Unix platforms (Solaris and Linux) and Windows while a permanent fix is found and implemented.

Solution:

Separate solutions exists for Unix and Windows based systems as noted below.

Unix

1. Add following line to the listener.ora file ($NH_ORACLE_HOME/network/admin)
   SECURE_REGISTER_LISTENER = (IPC)
   
   
2. Update following parameter
   $NH_HOME/bin/sys/nhisql "alter system set local_listener='(DESCRIPTION=(ADDRESS=(PROTOCOL=IPC) (KEY=EHEALTH)))' scope = both";
   
   
3. Stop and start the listener
   
   
   1. Stop eH services - nhServer stop;
   2. nhConfigDbNet -stopListener
   3. nhConfigDbNet -startListener
   4. nhServer start

• Verify that the changes are in place.
  
  
  1. Check the parameter is set with the command:
     
     $NH_HOME/bin/sys/nhisql "show parameter listener"
     
     The output will look like
     

     NAME               TYPE           VALUE---------------- ------------ ------------------------------------------------local_listener     string         (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EHEALTH)))

Windows

1. Change directory to %NH_ORACLE_HOME%/network/admin
   
   
   1. Cd %NH_ORACLE_HOME%/network/admin
   2. Open the listener.ora file in an editor
   3. Add the following line to the end of file
   
   
   SECURE_REGISTER_listener=(IPC)
   
   
2. Set the local_listener parameter in database with the next steps.
   
   
   1. Change directory to %NH_ORACLE_HOME%/database and modify the init{ORACLE_SID}.ora.usr file
      
      (Note: (SID) is the value of the output of the command
      
      env | grep ORACLE_SID
      
      In the example above if that returns ORACLE_SID=EHEALTH, then the file name to edit would be
      initEHEALTH.ora.usr)
      
      
   2. Add the following line to the file:
      
      local_listener='(DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EHEALTH)))'
      
      
   3. Regenerate the oracle spfile by doing this
      
      Stop the eHealth database and services
      
      nhServer stop
      nhStopDb immediate
      
      cd to %NH_ORACLE_HOME%/database and remove the SPFILE(ORACLE)SID).ORA file
      
      Start the eHealth database
      
      nhStartDb
      
      cd to %NH_HOME%/bin/sys and run the following command
      
      %NH_HOME%/bin/sys/nhisql -sysdba "create spfile from pfile"
      
      
   4. Restart the eHealth database and services
      
      nhStopDb immediate
      nhStartDb
      nhServer start
      
      
   5. Verify that the changes are in place with the command:
      
      %NH_HOME%/bin/sys/nhisql "show parameter listener"
      
      The output will look like
      

      NAME               TYPE      VALUE
      ---------------- --------- --------------------------------------------------local_listener     string    (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EHEALTH)))

Release:
Component: EHORA