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SI60082 - OSP-DHCP/ CVE fix for CVE-2015-8605 and CVE-2016-2774

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


Order this fix

Abstract

OSP-DHCP/ CVE fix for CVE-2015-8605 and CVE-2016-2774


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

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



NOTICE:
-------
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including programs that circumvent control technology designed to limit
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for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

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APAR Error Description / Circumvention

-----------------------------------------------
CVE-2015-8605: A badly formed packet with an invalid IPv4 UDP
length field can cause a DHCP server, client, or relay program
to terminate abnormally.

CVE-2016-2774: ISC DHCP is vulnerable to a denial of service,
caused by the failure to limit the number of open TCP
connections to the ports for inter-process communications and
control. By opening a large number of TCP connections, a remote
attacker from within the local network could exploit this
vulnerability to become unresponsive or consume all available
sockets.

CORRECTION FOR APAR SE64406 :
-----------------------------
CVE-2015-8605: With this fix, the badly formed packet with an
invalid IPv4 UDP length field can be checked and discarded.

CVE-2016-2774: Mitigation code which will make this
vulnerability harder to exploit will be added.

CIRCUMVENTION FOR APAR SE64406 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


********************************************************************
THE FOLLOWING ARE SUPERSEDED SPECIAL INSTRUCTIONS. IF THE SUPERSEDED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SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI44847 :
=================================================

End ISC DHCP server on the system
ENDTCPSVR SERVER(*DHCP)
Then apply the PTF
Start ISC DHCP on the system
STRTCPSVR SERVER(*DHCP)


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   SI44847      OSP USING ISC VERSION OF DHCP, WHENEVER NEW LEASE IS OBTAINE
   SI37086      Code Integrate of ISC DHCP Binary for GA Resave

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770SS1
APAR Fixed..........................View details for APAR SE64406
Superseded by:......................View fix details for PTF SI76508
Recompile...........................N
Library.............................QDNS
MRI Feature ........................NONE
Cum Level...........................C6320710


IBM i Support

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Document Information

Modified date:
16 September 2021