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MF64536 - LIC-SSL System TLS ROBOT attack VU#144389

PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-SSL System TLS ROBOT attack VU#144389


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
PRE  5770999  V7R2M0    MF58685   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
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APAR Error Description / Circumvention

-----------------------------------------------
As described in Vulnerability Note VU#144389:
TLS implementations may disclose side channel information via
discrepancies between valid and invalid PKCS#1 padding, and may
therefore be vulnerable to Bleichenbacher-style attacks. This
attack is known as a "ROBOT attack".

This problem applies to RSA key exchange cipher suites which
start with TLS_RSA or RSA.

CORRECTION FOR APAR MA46852 :
-----------------------------
Process different PKCS #1 v1.5 padding errors generated by the
ROBOT attack identically from the view point of the attacker so
discrepancies cannot be used to distinguish between valid and
invalid messages.

CIRCUMVENTION FOR APAR MA46852 :
--------------------------------
On IBM i 7.2 or newer partitions, disable the RSA key exchange
cipher suites by removing them from the QSSLCSL system value.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF64137      LIC-SSL SYSTEM TLS CLIENTHELLO DOES NOT INCLUDE EC_POINT_FOR
   MF63206      OSP-F/QSYEVTNT-RCX'0005'-MSGCPI22AA MSGCPI22AA, DETECTION PO
   MF62778      LIC-SSL Remove 3DES from System SSL/TLS default
   MF62787      LIC-SSL TLS Alert Record Leaked
   MF62317      OSP-WAIT SOCKET OBJECT GARBAGE COLLECTION TAKES TOO LONG TO
   MF61243      LIC-SSL Remove RSA_MD5 from System SSL/TLS default sig alg l
   MF60432      LIC-SSL Default cipher suite list empty
   MF60368      LIC-COMM-SSL Send SCSV instead of RI Extension when possible
   MF60333      LIC-SSL Remove SSLv3 and RC4 from System SSL default
   MF59777      LIC-SSL LEAK WHEN SOCKET CLOSED IN 2ND THREAD
   MF59777      LIC-COMM-TCPIP-INCORROUT FTPS PROBLEMS WITH SSL REHANDSHAKE
   MF58557      LIC-SSL Certificate Verify Message Signature Error
   MF58230      LIC-SSL ECDHE Processing Location
   MF57990      LIC-SSL SNI JKS
   MF57910      LIC-COMM-SSL OCSP not working as expected
   MF57818      LIC-SSL SNI mixed case
   MF57694      LIC-COMM-SSL Cipher Selection Enhancement
   MF57694      LIC-SSL SNI match not found
   MF59677      LIC-SSL Control Block Leak In Error Path
   MF59644      JVA-RUN Java Secure Socket Extension (JSSE) Support
   MF57909      LIC-SSL GSKit GSK_SSL_EXTN_SERVERNAME_REQUEST on session
   MF60334      LIC-SSL Remove SSLv3 and RC4 from System SSL default
   MF60156      LIC-SSL System SSL Object Garbage Collection
   MF60139      LIC-SOCKETS AUDIT RECORD SK SUBTYPE A TELNET

Summary Information

System.............................. i
Models..............................
Release............................. V7R2M0
Licensed Program............... 5770999
APAR Fixed.......................... View details for APAR MA46852
Superseded by:......................
Recompile........................... N
Library............................. QSYS
MRI Feature ........................ NONE
Cum Level........................... C8249720


System i Support

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Document information

More support for: i family

Software version: V7R2M0

Operating system(s): OS/400

Reference #: MF64536

Modified date: 15 January 2018