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SI69882 - OSP-DNS/Fix CVE-2018-5743 for DNS bind

PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

OSP-DNS/Fix CVE-2018-5743 for DNS bind


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  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 license agreement which
accompanied, or was contained in, the Program for which you are obtaining
the PTF.  You are not authorized to install or use the PTF except as part
of a Program for which you have a valid Proof of Entitlement.

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REGARDING THE PTF.

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form and/or may be viewed using the Work with Software Agreements (WRKSFWAGR)
CL command.


APAR Error Description / Circumvention

-------------------------------------------------
ISC released CVE-2018-5743.
CVE-2018-5743: By design, BIND is intended to limit the number
of TCP clients that can be connected at any given time. The
number of allowed connections is a tunable parameter which, if
unset, defaults to a conservative value for most servers.
Unfortunately, the code which was intended to limit the number
of simultaneous connections contains an error which can be
exploited to grow the number of simultaneous connections beyond
this limit.

CORRECTION FOR APAR 'SE71220' :
-------------------------------
Fixed the problem with the ISC-provided fix.

CIRCUMVENTION FOR APAR 'SE71220' :
----------------------------------
None.


Activation Instructions

None.




Special Instructions

IF DNS SERVER IS NOT USED, THE PTF CAN BE IGNORED AND NO ACTION IS
REQUIRED. OTHERWISE, PLEASE SAVE DOMAIN NAME SERVER DATA AS A BACKUP
BEFORE APPLYING THE PTF. AND THEN FOLLOW THESE STEPS:
1. END ALL DOMAIN NAME SERVERS ON THE SYSTEM: ENDTCPSVR SERVER(*DNS)
DNSSVR(*ALL)
2. APPLY THE PTF
3. START ALL DOMAIN NAME SERVERS OR A SPECIFIED ONE: STRTCPSVR
SERVER(*DNS) DNSSVR(*ALL) OR STRTCPSVR SERVER(*DNS) DNSSVR(<DNS_NAME>)

********************************************************************
THE FOLLOWING ARE SUPERSEDED SPECIAL INSTRUCTIONS. IF THE SUPERSEDED
PTF HAS ALREADY BEEN APPLIED AND ITS SPECIAL INSTRUCTION FOLLOWED,
IT IS NOT NECESSARY TO FOLLOW THAT SPECIAL INSTRUCTION AGAIN.
********************************************************************

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI68478 :
=================================================

IF DNS SERVER IS NOT USED, THE PTF CAN BE IGNORED AND NO ACTION IS
REQUIRED. OTHERWISE, PLEASE SAVE DOMAIN NAME SERVER DATA AS A BACKUP
BEFORE APPLYING THE PTF. AND THEN FOLLOW THESE STEPS:
1. END ALL DOMAIN NAME SERVERS ON THE SYSTEM: ENDTCPSVR SERVER(*DNS)
DNSSVR(*ALL)
2. APPLY THE PTF
3. START ALL DOMAIN NAME SERVERS OR A SPECIFIED ONE: STRTCPSVR
SERVER(*DNS) DNSSVR(*ALL) OR STRTCPSVR SERVER(*DNS) DNSSVR(<DNS_NAME>)

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI63738 :
=================================================

Option 31(Domain Name System) must be installed in the system before
applying the PTF.

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI61239 :
=================================================

PLEASE SAVE DOMAIN NAME SERVER DATA AS A BACKUP BEFORE APPLYING THE
PTF. AND THEN FOLLOW THESE STEPS:
1. END ALL DOMAIN NAME SERVERS ON THE SYSTEM: ENDTCPSVR SERVER(*DNS)
DNSSVR(*ALL)
2. APPLY THE PTF
3. START ALL DOMAIN NAME SERVERS OR A SPECIFIED ONE: STRTCPSVR
SERVER(*DNS) DNSSVR(*ALL) OR STRTCPSVR SERVER(*DNS) DNSSVR(<DNS_NAME>)

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI40965 :
=================================================

Option 31 (Domain Name System) must be installed in the system before
apply this PTF.

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI55748 :
=================================================

END DOMAIN NAME SERVERS ON THE SYSTEM
EXAMPLE: ENDTCPSVR SERVER(*DNS) DNSSVR(*ALL)
THEN APPLY THE PTF
START DOMAIN NAME SERVER AGAIN
EXAMPLE: STRTCPSVR SERVER(*DNS) DNSSVR(<DNS_NAME>)


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   SI69120      OSP-DNS/Fix CVE-2018-5744, CVE-2018-5745 and CVE-2019-6465 f
   SI68705      OSP-DNS/Fix CVE-2018-5741 for DNS bind
   SI68478      OSP-DNS/Fix CVE-2018-5740 for DNS bind
   SI66583      OSP-MSGMCH4426-PAR RUNDNSUPD COMMAND GETS MCH4426 ESCAPE MES
   SI66814      OSP-DNS/Fix CVE-2017-3145 for DNS bind
   SI65338      OSP-DNS/Refresh DNS BIND to fix CVE-2017-3142 and CVE-2017-3
   SI64615      OSP-DNS/Fix CVE-2017-3136 and CVE-2017-3137 for DNS bind
   SI63774      OSP-DNS/Fix CVE-2016-9131, CVE-2016-9444 and CVE-2017-3135 f
   SI63738      OSP-INCORROUT USING STRHOSTQRY GIVES INCORRECT OUT PUT WHEN
   SI62977      OSP-DNS/Fix CVE-2016-2775, CVE-2016-2776 and CVE-2016-8864 f
   SI61239      OSP-DNS upgrades from bind 9.7.4 to bind 9.10.1
   SI40965      OSP-DNS DYNAMIC PTR UPDATE WITH KEY NSUPDATE
   SI60348      OSP-DNS/Fix CVE-2016-1285 and CVE-2016-1286 for DNS bind
   SI59570      OSP-DNS CVE-2015-8704 SPECIFIC APL DATA COULD TRIGGER AN INS
   SI59101      OSP-DNS/Fix CVE-2015-8000 for DNS bind
   SI57654      TCPIP-CFG-UNPRED
   SI55748      OSP-DNS Fix for CVE-2014-8500:  A Defect in Delegation Handl
   SI51669      DNS - BIND upgraded to 9.7.4-P1
   SI45939      OSP-DNS-F/QP2SHELL2-T/QTOBDNS-MSGCPFB9C6 DNS SERVER CRASHES
   SI44999      OSP-DNS-INCORROUT NSLOOKUP OUTPUT WRONG
   SI37039      Integrity Problem

Summary Information

System.............................. i
Models..............................
Release............................. V7R1M0
Licensed Program............... 5770SS1
APAR Fixed.......................... SE71220
Superseded by:...................... View fix details for PTF SI70723
Recompile........................... N
Library............................. QDNS
MRI Feature ........................ NONE
Cum Level........................... NONE


IBM i Support

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Document information

More support for: i family

Software version: V7R1M0

Operating system(s): OS/400

Reference #: SI69882

Modified date: 14 June 2019