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IJ29416: JAVA.LANG.NULLPOINTEREXCEPTION IN KRB5CONTEXT.AUTHENTICATE() WITH NULL CLIENT MESSAGE SEQUENCE NUMBER.

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: java.lang.NullPointerException:
  at
com.ibm.security.jgss.mech.krb5.Krb5Context.authenticate(Krb5Con
text.java:2314)
  at
com.ibm.security.jgss.mech.krb5.Krb5Context.acceptSecContext(Krb
5Context.java:885)
  at
com.ibm.security.jgss.mech.krb5.Krb5Context.acceptSecContext(Krb
5Context.java:940)
  at
com.ibm.security.jgss.mech.spnego.SPNEGOContext.processInitToken
(SPNEGOContext.java:1303)
  at
com.ibm.security.jgss.mech.spnego.SPNEGOContext.acceptSecContext
(SPNEGOContext.java:660)
  at
com.ibm.security.jgss.GSSContextImpl.acceptSecContext(GSSContext
Impl.java:586)
  at
com.ibm.security.jgss.GSSContextImpl.acceptSecContext(GSSContext
Impl.java:493)
.

Local fix

  • N/A

Problem summary

  • Per RFC-1510 The Kerberos Network Authentication Service (V5)
the use of message sequence numbers is OPTIONAL.  If message
sequence
numbers are NOT used, the associated field in the Kerberos
client Authenticator is NULL.  The changes associated with
PR142695 "Oracle Security
Fix 8226352: Improve Kerberos interop capabilities" did not
properly allow for the legacy JGSS component NULL sequence
number handling.

Problem conclusion

  • Added Kerberos client Authenticator NULL sequence number
handling to
com.ibm.security.jgss.mech.krb5.Krb5Context.authenticate()
The files affected by this APAR are:  ibmjgssprovider.jar (build
build_20201120--28).
The associated Hursley RTC Problem Report is 144525.
The associated Austin Git issue is Issue# 1 for IBMJGSS.
The associated Austin APAR issue is IJ29317.
JVMs affected include: Java 8.0.
The fix was delivered for Java 8.0 SR6 FP25.
.
This APAR will be fixed in the following Java Releases:
   8    SR6 FP25  (8.0.6.25)
.
Contact your IBM Product's Service Team for these Service
Refreshes and Fix Packs.
For those running stand-alone, information about the available
Service Refreshes and Fix Packs can be found at:
           https://www.ibm.com/developerworks/java/jdk/

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ29416
    • 

  • Reported component name
    SECURITY
    • 

  • Reported component ID
    620700125
    • 

  • Reported release
    270
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-11-20
    • 

  • Closed date
    2020-11-23
    • 

  • Last modified date
    2020-11-23
    • 





    

  • 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
    SECURITY
    • 

  • Fixed component ID
    620700125
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"270"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            24 November 2020
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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