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

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



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-------
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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THE FOLLOWING ARE SUPERSEDED SPECIAL INSTRUCTIONS. IF THE SUPERSEDED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SPECIAL INSTRUCTIONS FOR SUPERSEDED PTF SI44847 :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.......................... SE64406
Superseded by:...................... View fix details for PTF SI67242
Recompile........................... N
Library............................. QDNS
MRI Feature ........................ NONE
Cum Level........................... C6320710


System i Support

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Document information

More support for: i family

Software version: V7R1M0

Operating system(s): OS/400

Reference #: SI60082

Modified date: 31 May 2016