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MF67874 - LIC-COMM-TCPIP-INCORROUT Response sent to packet from multic

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-COMM-TCPIP-INCORROUT Response sent to packet from multic


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
TR   5770999  V7R2M0    MF99109   00/00    0000



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.

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Code', the terms of which were provided in a printed document that was
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REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
IPv4 packets received with a multicast IP source address are
accepted by TCP/IP and may generate a response. This results in
Nessus scanner reporting TCP/IP Multicast Address Handling
Remote DoS. The IBM i TCP/IP stack is not adversely affected by
these packets.

CORRECTION FOR APAR MA48619 :
-----------------------------
IPv4 packets received with an invalid source address (either a
multicast address, the limited broadcast address, or a directed
broadcast address) will be dropped.

CIRCUMVENTION FOR APAR MA48619 :
--------------------------------
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
--------------  ------------------------------------------------------------
     NONE

Summary Information

System..............................i
Models..............................
Release.............................V7R2M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA48619
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C1084720


IBM i Support

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Document Information

Modified date:
17 April 2021