ISC DHCP 4.2.4rc1 is now available
sar at isc.org
Mon Apr 30 21:50:56 UTC 2012
ISC DHCP 4.2.4rc1 is now available for download.
This is the first release candidate of ISC DHCP 4.2.4, a maintenance release which
contains many bug fixes including some previously released security patches.
This release of ISC DHCP 4.2.4rc1 includes source code from ISC BIND 9.8.2,
which has been recently found to contain a bug that can cause a segmentation
fault. (Please see the advisory at: https://kb.isc.org/article/AA-00664 )
The BIND bug does not affect the portions of code used by DHCP, but can
affect recursive resolvers. As a result, the copy of BIND provided with
this distribution of DHCP source should not be used to build standalone
DNS programs but only to produce the server and utilities built by the
DHCP package. If you need to build BIND for recursive nameservice purposes,
please download a version from http://www.isc.org/software/bind
ISC is producing a new release to replace BIND 9.8.2 but it was not available
in time to meet the schedule for this release. We shall release another
release candidate (rc2) containing the corrected version of BIND when the
updated BIND tarball is available.
A list of the changes in this release has been appended to the end
of this message. This release includes changes to the code to
allocate and manage IPv6 addresses, please pay particular attention
to this area in any testing you do. 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 4.2.4b1
Changes since 4.2.3
! Add a check for a null pointer before calling the regexec function.
Without this check we could, under some circumstances, pass
a null pointer to the regexec function causing it to segfault.
Thanks to a report from BlueCat Networks.
! Modify the DDNS handling code. In a previous patch we added logging
code to the DDNS handling. This code included a bug that caused it
to attempt to dereference a NULL pointer and eventually segfault.
While reviewing the code as we addressed this problem, we determined
that some of the updates to the lease structures would not work as
planned since the structures being updated were in the process of
being freed: these updates were removed. In addition we removed an
incorrect call to the DDNS removal function that could cause a failure
during the removal of DDNS information from the DNS server.
Thanks to Jasper Jongmans for reporting this issue.
- Fixed the code that checks if an address the server is planning
to hand out is in a reserved range. This would appear as
the server being out of addresses in pools with particular ranges.
- In the DDNS code handle error conditions more gracefully and add more
logging code. The major change is to handle unexpected cancel events
from the DNS client code.
- Tidy up the receive calls and eliminate the need for found_pkt
- Add support for Infiniband over sockets to the server and
relay code. We've tested this on Solaris and hope to expand
support for Infiniband in the future. This patch also corrects
some issues we found in the socket code. [ISC-Bugs #24245]
- Add a compile time check for the presence of the noreturn attribute
and use it for log_fatal if it's available. This will help code
checking programs to eliminate false positives.
- Fixed many compilation problems ("set, but not used" warnings) for
gcc 4.6 that may affect Ubuntu 11.10 users. [ISC-Bugs #27588]
- Modify the code that determines if an outstanding DDNS request
should be cancelled. This patch results in cancelling the
outstanding request less often. It fixes the problem caused
by a client doing a release where the txt and ptr records
weren't removed from the DNS.
- Use offsetof() instead of sizeof() to get the sizes for dhcpv6_relay_packet
and dhcpv6_packet in several more places. Thanks to a report from
Bruno Verstuyft and Vincent Demaertelaere of Excentis.
- Remove outdated note in the bootp keyword about the option not satisfying
the requirement of failover peers for denying dynamic bootp clients.
- Multiple items to clean up IPv6 address processing.
When processing an IA that we've seen check to see if the
addresses are usable (not in use by somebody else) before
handing it out.
When reading in leases from the file discard expired addresses.
When picking an address for a client include the IA ID in
addition to the client ID to generally pick different addresses
for different IAs.
[ISC-Bugs #23138] [ISC-Bugs #27945] [ISC-Bugs #25586]
- Remove unnecessary checks in the lease query code and clean up
several compiler issues (some dereferences of NULL and treating
an int as a boolean).
- Fix the NA and PD allocation code to handle the case where a client
provides a preference and the server doesn't have any addresses or
prefixes available. Previoulsy the server ignored the request with
this patch it replies with a NoAddrsAvail or NoPrefixAvai respone.
By default the code performs according to the errata of August 2010
for RFC 3315 section 17.2.2, to enable the previous style see the
seciton on RFC3315_PRE_ERRATA_2010_08 in includes/site.h. This option
may be removed in the future.
Thanks to Jiri Popelka at Red Hat for the patch.
- Fix up some issues found by static analysis
A potential memory leak and NULL dereference in omapi.
The use of a boolean test instead of a bitwise test in dst.
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