IBM Support

PH66915: SUPPORT FOR STRONGER DIFFIE-HELLMAN KEY EXCHANGE ALGORITHMS ON WAS LIBERTY SERVER - RXA

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APAR status

  • Closed as program error.

Error description

  • Currently, the WAS Liberty server - RXA supports the following
Diffie-Hellman key exchange algorithms:
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256

Local fix

  • 



Problem summary


    

  • ****************************************************************
* USERS AFFECTED:  All users of WebSphere Liberty collective   *
****************************************************************
* PROBLEM DESCRIPTION: Collective controller cannot            *
*                      start/stop members or view/edit         *
*                      members' server configuration.          *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Some SSH servers require stronger SSH key exchange algorithms

    



Problem conclusion


    

  • The following stronger Diffie-Hellman algorithms have been
added.
- diffie-hellman-group14-sha256
- diffie-hellman-group16-sha512
- diffie-hellman-group18-sha512

The fix for this APAR is targeted for inclusion in fix pack
25.0.0.7. For more information, see 'Recommended Updates for
WebSphere Application Server':
https://www.ibm.com/support/pages/node/715553

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PH66915
    • 

  • Reported component name
    LIBERTY PROFILE
    • 

  • Reported component ID
    5724J0814
    • 

  • Reported release
    900
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2025-06-10
    • 

  • Closed date
    2025-07-11
    • 

  • Last modified date
    2025-07-11
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    LIBERTY PROFILE
    • 

  • Fixed component ID
    5724J0814
    • 



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"900","Line of Business":{"code":"LOB77","label":"Automation Platform"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            11 July 2025
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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