PI81589: USE ECDHE_RSA CIPHERS BY DEFAULT UNDER TLS1.2 IN IBM HTTP Server 8.0 and 8.5

8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as new function.

Error description

• IHS supports ECDHE_RSA ciphers, but does not use them by default
  nor prefer them.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM HTTP Server (IHS) 8.0 and 8.5 users     *
  *                  with SSL enabled                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: TLS1.2 in IHS 8.0 and 8.5 was not       *
  *                      using ECDHE_RSA ciphers by default      *
  ****************************************************************
  * RECOMMENDATION:  Apply this fix if using IHS 8.0 and 8.5     *
  *                  with SSL enabled                            *
  ****************************************************************
  ECDHE_RSA ciphers were not being used by default under TLS1.2
  in IHS 8.0 and 8.5
  

Problem conclusion

• The default ciphers under TLS1.2 were changed to use ECDHE_RSA
  ciphers as highest priority.
  
  This fix is targeted for IBM HTTP Server fix packs:
  - 8.0.0.14
  - 8.5.5.12
  

Temporary fix

Comments

APAR Information

• 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

  IBM HTTP SERVER

• Fixed component ID

  5724J0801

Applicable component levels

• R800 PSY

     UP

• R850 PSY

     UP