ISC DHCP 4.0.2 is now available
sar at isc.org
Tue Jan 26 19:03:03 UTC 2010
ISC DHCP 4.0.2 is now available for download.
This is the production release of ISC DHCP 4.0.2, a maintenance release
which contains a number of bug fixes. These fixes include two that
address security issues, both of which were included in previous 4.0.2
betas. For details on these and other fixes see the list of changes
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:
This release, and its OpenPGP-signatures are available now from:
ISC's Release Signing Key can be obtained at:
Changes since 4.0.2rc1
Changes since 4.0.2b3
- When using 'ignore client-updates;', the FQDN returned to the client
is no longer truncated to one octet.
Changes since 4.0.2b2
- Fix test in dhcp_interface_signal_handler to check that the inner
handler has a signal_handler before calling it.
- ./configure now checks to ensure the intX_t and u_intX_t types are
defined, correcting a compilation failure when using Sun's
- 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
- 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.
Changes since 4.0.2b1
- 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 4.0.1
- Remove infinite loop in token_print_indent_concat().
- 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.
- Suppress spurious warnings from configure about --datarootdir
- 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.
- 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.
- 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 expiration event.
- 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
- 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
- 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.
- 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).
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