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SI80431 - OSP-DNS/Fix CVE-2021-25220 and CVE-2022-0396 for DNS bind

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

OSP-DNS/Fix CVE-2021-25220 and CVE-2022-0396 for DNS bind


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
PRE  5770SS1  V7R4M0    SI80455   NONE     0031
CO   5770SS1  V7R4M0    SI80430   NONE     0031
DIST 5733SC1  V7R2M0    SI70596   NONE     0001



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.

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.

The applicable license agreement may have been provided to you in printed
form and/or may be viewed using the Work with Software Agreements (WRKSFWAGR)
CL command.


APAR Error Description / Circumvention

-------------------------------------------------
ISC released CVE-2021-25220 and CVE-2022-0396.
CVE-2021-25220: When using forwarders, bogus NS records supplied
by, or via, those forwarders may be cached and used by named if
it needs to recurse for any reason, causing it to obtain and
pass on potentially incorrect answers.
CVE-2022-0396: Specifically crafted TCP streams can cause
connections to BIND to remain in CLOSE_WAIT status for an
indefinite period of time, even after the client has terminated
the connection.

CORRECTION FOR APAR 'SE78158' :
-------------------------------
Fixed the problems with the ISC-provided fixes.

CIRCUMVENTION FOR APAR 'SE78158' :
----------------------------------
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 UNDER
/QIBM/USERDATA/OS400/DNS 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 SI79194 :
=================================================

IF DNS SERVER IS NOT USED, THE PTF CAN BE IGNORED AND NO ACTION IS
REQUIRED. OTHERWISE, PLEASE SAVE DOMAIN NAME SERVER DATA UNDER
/QIBM/USERDATA/OS400/DNS 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>)

DEPENDENCY: PASE AND RPM PACKAGES OPENSSL 1.1.1 AND LIBUV 1.42.0 OR
NEWER MUST BE INSTALLED BEFORE STARTING DNS SERVERS.

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI70734 :
=================================================

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>)

NOTE: OPENSSL 1.1.1 MUST BE AVAILABLE.

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI68467 :
=================================================

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>)


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

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>)

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>)

SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI69622 :
=================================================

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>)


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   SI79936      OSP-DNS/Fix CVE-2021-25220 and CVE-2022-0396 for DNS bind
   SI79194      TCP-OTHER-UPGRADE DNS BIND TO BIND 9.16.
   SI77560      OSP-DNS/FIX CVE-2021-25219
   SI77005      TCPIP-OTHER-UNPRED DNS SERVER SOMETIMES CRASHES DURING BACKU
   SI76709      TCPIP-TCPIP-OTHER-UNPRED DNS SERVER JOBLOG SHOW A LOT OF 'GE
   SI76268      OSP-DNS/FIX CVE-2021-25214 AND CVE-2021-25215
   SI74159      OSP-DNS/FIX CVE-2020-8622 and CVE-2020-8624
   SI73482      OSP-DNS/FIX CVE-2020-8616 AND CVE-2020-8617 FOR DNS BIND
   SI70734      OSP-DNS/FIX CVE-2019-6471 FOR DNS BIND
   SI69886      OSP-DNS/Fix CVE-2018-5743 for DNS bind
   SI69622      OSP-DNS/Fix CVE-2018-5744, CVE-2018-5745 and CVE-2019-6465 f

Summary Information

System..............................  i
Models..............................  
Release.............................  V7R4M0
Licensed Program....................  5770SS1
APAR Fixed..........................  View details for APAR SE78158
Superseded by:......................  View fix details for PTF SI81707
Recompile...........................  N
Library.............................  QDNS
MRI Feature ........................  NONE
Cum Level...........................  NONE


IBM i Support

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Document Information

Modified date:
28 November 2022