IBM Support

MF62780 - LIC-SSL Remove 3DES from System SSL/TLS default

PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

LIC-SSL Remove 3DES from System SSL/TLS default


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
NONE



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
The 3DES cipher suites should not be used due to the SWEET32
vulnerability.

CORRECTION FOR APAR MA45974 :
-----------------------------
An administrator can completely disable the 3DES cipher suites
for System SSL using the QSSLCSL system value without this PTF.

This PTF removes the 3DES cipher suites from the eligible
default cipher specification list when they remain enabled by
the system values.

Applications coded to use the default values will no longer
negotiate the use of 3DES with peers.

If 3DES support is required by peers of such an application
after this PTF is applied, the values can be added back to the
System SSL eligible default cipher suite list using System
Service Tools (SST) Advanced Analysis Command SSLCONFIG.

To change the System SSL settings with the Start System Service
Tools (STRSST) command, follow these steps:

1. Open a character-based interface.
2. On the command line, type STRSST.
3. Type your service tools user name and password.
4. Select option 1 (Start a service tool).
5. Select option 4 (Display/Alter/Dump).
6. Select option 1 (Display/Alter storage).
7. Select option 2 (Licensed Internal Code (LIC) data).
8. Select option 14 (Advanced analysis).
9. Select option 1 (SSLCONFIG).
10. Enter -h

This will show the help screen that describes the input strings
to change the System SSL setting for
-eligibleDefaultCipherSuites.

CIRCUMVENTION FOR APAR MA45974 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF61282      LIC-SSL Return GSK_ERROR_UNSUPPORTED for unsupported signatu

Summary Information

System.............................. i
Models..............................
Release............................. V7R3M0
Licensed Program............... 5770999
APAR Fixed.......................... View details for APAR MA45974
Superseded by:......................
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... C7061730


System i Support

IBM disclaims all warranties, whether express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. By furnishing this document, IBM grants no licenses to any related patents or copyrights. Copyright © 1996,1997,1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 IBM Corporation. Any trademarks and product or brand names referenced in this document are the property of their respective owners. Consult the Terms of use link for trademark information.

Document information

More support for: i family

Software version: V7R3M0

Operating system(s): OS/400

Reference #: MF62780

Modified date: 03 November 2016