ISC DHCP 4.0.3b1 is now available!

[David W. Hankins]

ISC DHCP 4.0.3b1 is now available for download.

This is the FIRST BETA of ISC DHCP 4.0.3, a maintenance release which
contains a number of bug fixes.

A list of the changes in this release has been appended to the end
of this message.  For a complete list of changes from any previous
release, please consult the RELNOTES file within the source
distribution, or on our website:

    http://www.isc.org/software/dhcp/403b1

This release, and its OpenPGP-signatures are available now from:

    ftp://ftp.isc.org/isc/dhcp/dhcp-4.0.3b1.tar.gz
    ftp://ftp.isc.org/isc/dhcp/dhcp-4.0.3b1.tar.gz.sha512.asc
    ftp://ftp.isc.org/isc/dhcp/dhcp-4.0.3b1.tar.gz.sha256.asc
    ftp://ftp.isc.org/isc/dhcp/dhcp-4.0.3b1.tar.gz.sha1.asc

ISC's Release Signing Key can be obtained at:

    http://www.isc.org/about/openpgp/


			Changes since 4.0.2

- Cleaned up some compiler warnings

- Prohibit including lease time information in a response to a DHCP INFORM
  Bug ticket 21092.

! Accept a client id of length 0 while hashing.  Previously the server would
  exit if it attempted to hash a zero length client id, providing attackers
  with a simple denial of service attack.  [ISC-Bugs #21253]
  CERT: VU#541921 - CVE: CVE-2010-2156

- A bug was fixed that could cause the DHCPv6 server to advertise/assign a
  previously allocated (active) lease to a client that has changed subnets,
  despite being on different shared networks.  Dynamic prefixes specifically
  allocated in shared networks also now are not offered if the client has
  moved.  [ISC-Bugs #21152]

- Add declaration for variable in debug code in alloc.c.  [ISC-Bugs #21472]

- Documentation cleanup covering multiple tickets
  [ISC-Bugs #20265] [ISC-Bugs #20259] [ISC-Bugs #19536] minor cleanup
  [ISC-Bugs #20263] add text describing some default values
  [ISC-Bugs #20193] single quotes at the start of a line indicate a control
  line to nroff, escape them if we actually want a quote.
  [ISC-Bugs #18916] sync the pointer to web pages amongst the different docs
  [ISC-Bugs #20245] clarify editing the failover state in a lease file to put
  a server into the PARTNER-DOWN state.

- 'get-host-names true;' now also works even if 'use-host-decl-names true;'
  was also configured.  The nature of this repair also fixes another
  error; the host-name supplied by a client is no longer overridden by a
  reverse lookup of the lease address.  Thanks to a patch from Wilco Baan
  Hofman supplied to us by the Debian package maintenance team.
  [ISC-Bugs #21691] {Debian Bug#509445}

- The .TH tag for the dhcp-options manpage was typo repaired
  thanks to a report from jidanni and the Debian package maintenance
  team.  [ISC-Bugs #21676] {Debian Bug#563613}

- More documentation changes - primarily to put the options in the dhclient
  and dhcpd man pages into the standard form.  Thanks in part to a patch
  from David Cantrell at Red Hat.
  [ISC-Bugs #20264] and parts of [ISC-Bugs #17744] dhclient.8 changes

- Minor compilation errors - type mismatches, extra semi-colons after macros
  [ISC-Bugs #20884] [ISC-Bugs #20953] [ISC-Bugs #20955]

- Add code to clear the pointer to an object in an OMAPI handle when the
  object is freed due to a dereference.  [ISC-Bugs #21306]

- Fixed a bug that leaks host record references onto lease structures,
  causing the server to apply configuration intended for one host to any
  other innocent clients that come along later.  [ISC-Bugs #22018]

- Minor code fixes
  [ISC-Bugs #19566] When trying to find the zone for a name for ddns allow
  the name to be at the apex of the zone.
  [ISC-Bugs #19617] Restrict length of interface name read from command line
  in dhcpd - based on a patch from David Cantrell at Red Hat.
  [ISC-Bugs #20039] Correct some error messages in dhcpd.c
  [ISC-Bugs #20070] Better range check on values when creating a DHCID.
  [ISC-Bugs #20198] Avoid writing past the end of the field when adding 
  overly long file or server names to a packet and add a log message
  if the configuration supplied overly long names for these fields.
  Thanks to Martin Pala.
  [ISC-Bugs #21497] Add a little more randomness to rng seed in client
  thanks to a patch from Jeremiah Jinno.

- Correct error handling in DLPI [ISC-Bugs #20378]

- Remove __sun__ and __hpux__ typedefs in osdep.h as they are now being
  checked in configure.  [ISC-Bugs #20443]

- Modify how the cmsg header is allocated the v6 send and received routines
  to compile on more compilers.  [ISC-Bugs #20524]

- When parsing a domain name free the memory for the name after we are
  done with it.  [ISC-Bugs #20824]

- Add an elapsed time option to the release message and refactor the
  code to move most of the common code to a single routine.
  [ISC-Bugs #21171].

- Parse date strings more properly - the code now handles semi-colons in
  date strings correctly.  Thanks to a patch from Jiri Popelka at Red Hat.
  [ISC-Bugs #21501, #20598]

- Fixes to lease input and output.
  [ISC-Bugs #20418] - Some systems don't support the "%s" argument to
  strftime, paste together the same string using mktime instead.
  [ISC-Bugs #19596] - When parsing iaid values accept printable
  characters.
  [ISC-Bugs #21585] - Always print time values in omshell as hex
  instead of ascii if the values happen to be printable characters.

- Minor changes for scripts, configure.ac and Makefiles
  [ISC-Bugs #19147] Use domain-search instead of domain-name in manual and
                    example conf file.  Thanks to a patch from David Cantrell
                    at Red Hat.
  [ISC-Bugs #19761] Restore address when doing a rebind in DHCPv6
  [ISC-Bugs #19945] Properly close the quote on some arguments.
  [ISC-Bugs #20952] Add 64 bit types to configure.ac
  [ISC-Bugs #21308] Add "PATH=" to CLIENT_PATH envrionment variable

! Handle pipe failures more gracefully.  Some OSes pass a SIGPIPE
  signal to a process and will kill the process if the signal isn't
  caught.  This patch adds code to turn off the SIGPIPE signal via
  a setsockopt() call and to ignore the SIGPIPE signal in case the
  OS doesn't support the necessary setsockopt() option.  This problem
  was found during internal testing when the two servers in a failover
  pair were repeatedly unable to communicate for longer than the
  max-response-delay value.  Eventually one of the pair attempted a
  write() call at just the same time as the other server killed the
  connection and caused an uncaught SIGPIPE signal which caused the
  OS to kill the server.
  This is a minor security issue.  It is a security issue as it can 
  cause a server to stop.  It is minor as the attacker would need to
  be able to interrupt traffic between the partners in a failover 
  pair for max-response-delay seconds at will - in which case the 
  defender has bigger problems than the DHCP server being killed.
  Using the NIST CVSS security vulnerability rating system this
  issue scored 1.2, meaning it is not a major risk for users.
  [ISC-Bugs #22269]

-- 
David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
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