ISC DHCP 4.1.1 is now available
sar at isc.org
Mon Jan 18 22:32:28 UTC 2010
ISC DHCP 4.1.1 is now available for download.
This is the production release of ISC DHCP 4.1.1, a maintenance release
which contains a number of bug fixes including two fixes for security
issues. These two were included in previous (beta) releases of 4.1.1.
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:
and click on "Read Release Notes & Download" or "Download Now" to start
the download directly.
This release, and its OpenPGP-signatures are available now from:
ISC's Release Signing Key can be obtained at:
Changes since 4.1.1rc1
- When using 'ignore client-updates;', the FQDN returned to the client
is no longer truncated to one octet.
Changes since 4.1.1b3
Changes since 4.1.1b2
- Fix test in dhcp_interface_signal_handler to check that the inner
handler has a signal_handler before calling it.
- Both host and subnet6 configuration groups are now included whether a
fixed-address6 (DHCPv6) is in use or not. Host scoped configuration
takes precedence. This fixes two bugs, one where host scoped
configuration would not be included from a non-fixed-address6 host
record, and the equal and opposite bug where subnet6 scoped
configuration would not be used when over-riding values were not
present in a matching fixed-address6 host configuration.
- ./configure now checks to ensure the intX_t and u_intX_t types are
defined, correcting a compilation failure when using Sun's compiler.
- Modified the handling of a connection to avoid releasing the omapi io
object for the connection while it is still in use. One symptom from
this error was a segfault when a failover secondary attempted to
connect to the failover primary if their clocks were not synchronized.
Changes since 4.1.1b1
- Remove infinite loop in token_print_indent_concat().
- Memory leak in the load_balance_mine() function is fixed. This would
leak ~20-30 octets per DHCPDISCOVER packet while failover was in use
and in normal state.
- Various compilation fixes have been included for the memory related
DEBUG #defines in includes/site.h.
- Fixed Linux client script 'unary operator expected' errors with
- Fixed setting hostname in Linux hosts that require hostname argument
to be double-quoted. Also allow server-provided hostname to
override hostnames 'localhost' and '(none)'.
- Added client support for setting interface MTU and metric, thanks to
Roy "UberLord" Marples <roy at marples.name>.
- Fixed failover reconnection retry code to continue to retry to
reconnect rather than restarting the listener.
- Compilation on Solaris with USE_SOCKETS defined in includes/site.h has
been repaired. Other USE_ overrides should work better.
- A check for the local flavor of IFNAMSIZ had a broken 'else'
condition, that probably still resulted in the correct behaviour (but
wouldn't use a larger defined value provided by the host OS).
- Fixed a bug where an OMAPI socket disconnection message would not
result in scheduling a failover reconnection, if the link had not
negotiated a failover connect yet (e.g.: connection refused, asynch
socket connect() timeouts).
- A bug was fixed that caused the 'conflict-done' state to fail to be
parsed in failover state records.
! A stack overflow vulnerability was fixed in dhclient that could allow
remote attackers to execute arbitrary commands as root on the system,
or simply terminate the client, by providing an over-long subnet-mask
option. CERT VU#410676 - CVE-2009-0692
- Versions 3.0.x syntax with multiple name->code option definitions is
now supported. Note that, similarly to 3.0.x, for by-code lookups
only the last option definition is used.
- Fixed a bug where a time difference of greater than 60 seconds between
a failover pair could cause the primary to crash on contact with the
secondary. Thanks to a patch from Steinar Haug.
- Don't look for IPv6 interfaces on Linux when running in DHCPv4 mode.
Thanks to patches from Matthew Newton and David Cantrell.
- Secondary servers in a failover pair will now perform ddns removals if
they had performed ddns updates on a lease that is expiring, or was
released through the primary. As part of the same fix, stale binding
scopes will now be removed if a change in identity of a lease's active
client is detected, rather than simply if a lease is noticed to have
expired (which it may have expired without a failover server noticing
in some situations).
- A patch supplied by David Cantrell at RedHat was applied that detects
invalid calling parameters given to the ns_name_ntop() function.
Specifically, it detects if the caller passed a pointer and size pair
that causes the pointer to integer-wrap past zero.
! Fixed a fenceposting bug when a client had two host records
configured, one using 'uid' and the other using 'hardware ethernet'.
Changes since 4.1.0
- Validate the argument to the -p option.
- The notorious 'option <unknown> ... larger than buffer' log line,
which is seen in some malformed DHCP client packets, was modified.
It now logs the universe name, and does not log the length values
(which are bogus corruption read from the packet anyway). It also
carries a hopefully more useful explanation.
- A bug was fixed that caused the server not to answer some valid
Solicit and Request packets, if the dynamic range covering any
requested addresses had been deleted from configuration.
- Suppress spurious warnings from configure about --datarootdir
- Update the code to deal with GCC 4.3. This included two sets of
changes. The first is to the configuration files to include the
use of AC_USE_SYSTEM_EXTENSIONS. The second is to deal with return
values that were being ignored.
- The db-time-format option was documented in manpages.
- Using reserved leases no longer results in 'lease with binding state
free not on its queue' error messages, thanks to a patch from Frode
- DDNS removal routines were updated so that the DHCID is not removed
until the client has been deprived of all A and AAAA records (not only
the last one of either of those). This resolves a bug where dual
stack clients would not be able to regain their names after either
- Fix a build error in dhcrelay, using older versions of gcc with
- Two uninitialized stack structures are now memset to zero, thanks to
patch from David Cantrell at Red Hat.
- Fixed a cosmetic bug where pretty-printing valid domain-search options
would result in an erroneous error log message ('garbage in format
- A bug in DLPI packet transmission (Solaris, HP/UX) that caused the
server to stop receiving packets is fixed. The same fix also means
that the MAC address will no longer appear 'bogus' on DLPI-based
- A bug in select handling was discovered where the results of one
select() call were discarded, causing the server to process the next
select() call and use more system calls than required. This has been
repaired - the sockets will be handled after the first return from
select(), resulting in fewer system calls.
- The update-conflict-detection feature would leave an FQDN updated
without a DHCID (still currently implemented as a TXT RR). This would
cause later expiration or release events to fail to remove the domain
name. The feature now also inserts the client's up to date DHCID
record, so records may safely be removed at expiration or release
time. Thanks to a patch submitted by Christof Chen.
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