MASTER_SITES= site1 \
site2
style continuation lines to be simple repeated
MASTER_SITES+= site1
MASTER_SITES+= site2
lines. As previewed on tech-pkg. With thanks to rillig for fixing pkglint
accordingly.
This is the release of ISC DHCP 4.3.4, a maintenance
release which contains a number of bug fixes and two
fixes for previously released security issues.
Full changes are too many to write here, please refer
<https://kb.isc.org/article/AA-01364/0/DHCP-4.3.4-Release-Notes.html>.
@PKG_SYSCONFDIR@ with hardcoded paths to /usr/pkg, possibly due to SUBST_STAGE
being set to post-patch. Revert that change, move SUBST_STAGE to
pre-configure, and perform some minor cleanup while here.
Bump PKGREVISION of all packages, ignoring pkglint's error that this shouldn't
be done in Makefile.common.
Changes since 4.3.3
! Update the bounds checking when receiving a packet.
Thanks to Sebastian Poehn from Sophos for the bug report and a suggested
patch.
[ISC-Bugs #41267]
Changes since 4.3.2rc2
- None
Changes since 4.3.2rc1
- Corrected a compilation error introduced by the fix for ISC-Bugs #37415.
The error occurs on Linux variants that do not support VLAN tag information
in packet auxiliary data. The configure script now only enables inclusion
of the VLAN tag-based logic if it is supported by the underlying OS.
[ISC-Bugs #38677]
Changes since 4.3.2b1
- Specifying the option, --disable-debug, on the configure script command line
now disables debug features. Prior to this, specifying --disable-debug
incorrectly enabled debug features. Thanks to Gustavo Zacarias for reporting
the issue.
[ISC-Bugs #37780]
- Unit test execution now uses a path augmented during configuration
processing of the --with-atf option to locate ATF runtime tools, atf-run
and atf-report. For most installations of ATF, this should alleviate the
need to manually include them in the PATH, as was formerly required.
If the configure script cannot locate the tools it will emit a warning,
informing the user that the tools must be in the PATH when running unit
tests.
Secondly, please note that "make check" will now exit with a failure status
code (non-zero) if one or more unit tests fail. This means that invoking
"make check" from an upper level directory will cause the make process to
STOP after the first test subdirectory with failed test(s). To force all
tests in all subdirectories to run, regardless of individual test outcome,
use the command "make -k check".
[ISC-Bugs #38619]
Changes since 4.3.1rc1
- None
Changes since 4.3.1b1
- Modify the linux and openwrt dhclient scripts to process information
from a stateless request. Thanks to Jiri Popelka at Red Hat for the
bug report and patch.
[ISC-Bugs 36102]
- Remove more unused RCSID tags. These weren't noticed in 4.3 as
the code isn't used anymore but we remove them here to keep the
code consistent across versions.
[ISC-Bugs #36451]
Changes since 4.2.0 (new features)
- If a client renews before 'dhcp-cache-threshold' percent of its lease
has elapsed (default 25%), the server will reuse the allocated lease
(provide a lease within the currently allocated lease-time) rather
than extend or renew the lease. This absolves the server of needing
to perform an fsync() operation on the lease database before reply,
which improves performance. [ISC-Bugs #22228]
Updated this patch to support asynchronous DDNS. If the server is
attempting to do DDNS on a lease it should be udpated and written to
disk even if that wouldn't be necessary due to the thresholding.
[ISC-Bugs #26311]
- The 'no available billing' log line now also logs the name of the last
matching billing class tried before failing to provide a billing.
[ISC-Bugs #21759]
- A problem with missing get_hw_addr function when --enable-use-sockets
was used is now solved on GNU/Linux, BSD and GNU/Hurd systems. Note
that use-sockets feature was not tested on those systems. Client and
server code no longer use MAX_PATH constant that is not defined on
GNU/Hurd systems. [ISC-Bugs #25979]
- Add a perl script in the contrib directory, dhcp-lease-list.pl, which
can parse v4 lease files and output the lease information in a more
human friendly manner. This was written by Christian Hammers with
some updates by vom and ISC. This is contributed code and is not
supported by ISC; however it may be useful to some users.
[ISC-Bugs #20680]
- Add support in v6 for on-commit, on-expire and on-release.
[ISC-Bugs #27912]
- Add support for using classes with v6.
[ISC-Bugs #26510]
- Update the DDNS code to current standards and allow for sharing
of DDNS entries between v4 and v6 clients. The new code is used
if the ddns-update-style is set to "standard", the older code is
still available if ddns-update-style is set to "interim". The
oldest DDNS code "ad-hoc" has been removed. Thanks to Thomas Pegeot
who submitted a patch for this issue. This patch is based on
that work with some modifications.
[ISC-Bugs #21139]
- Add a configuration option to the server to suppress using fsync().
Enabling this option will mean that fsync() is never called. This
may provide better performance but there is also a risk that a lease
will not be properly written to the disk after it has been issued
to a client and before the server stops. Using this option is
not recommended.
[ISC-Bugs #34810]
- Add some logging statements to indicate when the server is ready
to serve. One statement is emitted after the server has finished
reading its files and is about to enter the dispatch loop.
This is "Server starting service.".
The second is emitted when a server determines that both it and
its failover peer are in the normal state.
This is "failover peer <name>: Both servers normal."
[ISC-Bugs #33208]
- Add support for accessing options from v6 relays. The v6relay
statement allows the administrator to choose which relay to
use when searching for an option, see the dhcp-options man page
for a description. The host-identifier option has also been
updated to support the use of relay options, see the dhcpd.conf
man page for a description.
[ISC-Bugs #19598]
- When doing DDNS if there isn't an appropriate zone statement attempt
to find a reasonable nameserver via a DNS resolver. This restores
some functionality that was lost in the transition to asynchronous
DDNS. Due to the lack of security and increase in fragility of the
system when using this feature we strongly recommend the use of
appropriate zone statements rather than using this functionality.
[ISC-Bugs #30461]
- Add support for specifying the address from which to send
DDNS updates on the DHCP server. There are two new options
"ddns-local-address4" and "ddns-local-address6" that each take
one instance of their respective address types.
[ISC-Bugs #34779]
- Add ignore-client-uids option in the server. This option causes
the server to not record a client's uid in its lease. This
violates the specification but may also be useful when a client
can dual boot using different client ids but the same mac address.
Thank you to Brian De Wolf at Cal Poly Pomona for the patch.
[ISC-Bugs #32427]
[ISC-Bugs #35066]
- Extend the DHCPINFORM processing to honor the subnet selection option
and take host declarations into account.
Thanks to Christof Chen for testing and submitting the patch.
[ISC-Bugs #35015]
- Extend the hardware expression to look into the lease structure
for a hardware address if there is no packet. This allows the
server to find the hardware address during on-expiry processing.
[ISC-Bugs #24584]
- Add definitions for some options that have been specified by the IETF.
[ISC-Bugs #29268]
[ISC-Bugs #35198]
Changes since 4.3.0b1
- Tidy up receive packet processing.
Thanks to Brad Plank of GTA for reporting the issue and suggesting
a possible patch.
[ISC-Bugs #34447]
Changes since 4.3.0a1
- Modify the message displayed when a process hits a fatal error.
The new message is much shorter and simply points to the README
and our website for directions on bug submissions.
[ISC-Bugs #24789]
- Handle an absent resolv.conf file better.
[ISC-Bugs #35194]
Requires a hack to patch and configure the internal copy of bind for
cross-compilation.
Bump pkgrevision in case the way I did this hack changes anything.
ok agc
isc-dhclient4
isc-dhcp4
isc-dhcpd4
isc-dhcrelay4
Changes since 4.2.5
- A security issue in Bind9 was found and fixed. This release includes the
fixed Bind9 code. There have been no code changes to the DHCP code.
[ISC-Bugs #32688]
CVE: CVE-2013-2266
Changes since 4.2.4-P1
! An issue with the use of lease times was found and fixed. Making
certain changes to the end time of an IPv6 lease could cause the
server to abort. Thanks to Glen Eustace of Massey University,
New Zealand for finding this issue.
[ISC-Bugs #30281]
CVE: CVE-2012-3955
Fixes security problems.
Changes since 4.2.4
! Previously the server code was relaxed to allow packets with zero
length client ids to be processed. Under some situations use of
zero length client ids can cause the server to go into an infinite
loop. As such ids are not valid according to RFC 2132 section 9.14
the server no longer accepts them. Client ids with a length of 1
are also invalid but the server still accepts them in order to
minimize disruption. The restriction will likely be tightened in
the future to disallow ids with a length of 1.
Thanks to Markus Hietava of Codenomicon CROSS project for the
finding this issue and CERT-FI for vulnerability coordination.
[ISC-Bugs #29851]
CVE: CVE-2012-3571
! When attempting to convert a DUID from a client id option
into a hardware address handle unexpected client ids properly.
Thanks to Markus Hietava of Codenomicon CROSS project for the
finding this issue and CERT-FI for vulnerability coordination.
[ISC-Bugs #29852]
CVE: CVE-2012-3570
! A pair of memory leaks were found and fixed. Thanks to
Glen Eustace of Massey University, New Zealand for finding
this issue.
[ISC-Bugs #30024]
CVE: CVE-2012-3954
ISC's Release Signing Key can be obtained at:
http://www.isc.org/about/openpgp/
Changes since 4.2.4rc1
- Rotate the lease file when running in v6 mode.
Thanks to Christoph Moench-Tegeder at Astaro for the
report and the first version of the patch.
[ISC-Bugs #24887]
Changes since 4.2.4b1
- None
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.
[ISC-Bugs #26704].
CVE: CVE-2011-4539
! 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.
[ISC-Bugs #27078]
CVE: CVE-2011-4868
- 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.
[ISC-Bugs #26498]
- 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.
[ISC-Bugs #26287]
- Tidy up the receive calls and eliminate the need for found_pkt.
[ISC-Bugs #25066]
- 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.
[ISC-Bugs #27539]
- 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.
[ISC-BUGS #27858]
- 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.
[ISC-Bugs #27941]
- Remove outdated note in the description of the bootp keyword about the
option not satisfying the requirement of failover peers for denying
dynamic bootp clients.
[ISC-bugs #28574]
- 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]
[ISC-Bugs #27684]
- 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).
[ISC-Bugs #26203]
- 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 NoPrefixAvail response.
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
section 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.
[ISC-Bugs #22676]
- 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.
[ISC-Bugs #28941]
Alwo update isc-dhclient4, isc-dhcpd4 and isc-dhcrelay4.
Changes since 4.2.3-P1
! 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.
[ISC-Bugs #27078]
CVE: CVE-2011-4868
It implicitly update isc-dhclient4, isc-dhcpd4 and isc-dhcrelay4 to 4.2.3p1.
Changes since 4.2.3
! Add a check for a null pointer before calling the regexec function.
Without out 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.
[ISC-Bugs #26704].
CVE: CVE-2011-4539
net/isc-dhclient
net/isc-dhcp
net/isc-dhcpd
net/isc-dhcrelay
* Update MASTER_SITES.
* CHanges:
Changes since 4.2.3rc1
- None.
Changes since 4.2.2
- Fix the code that checks for an existing DDNS transaction to cancel
when removing DDNS information, so that we will continue with the
processing if we have a lease even if it doesn't have an outstanding
transaction. [ISC-Bugs #24682]
- Add AM_MAINTAINER_MODE to configure.ac to avoid rebuilding
configuration files. [ISC-Bugs #24107]
- Add support for passing DDNS information to a DNS server over
an IPv6 address. [ISC-Bugs #22647]
- Enhanced patch for 23595 to handle IPv4 fixed addresses more
cleanly. [ISC-Bugs #23595]
and isc-dhcrelay4. Here is quote from DHCP 4.2.2 Release Notes.
(http://ftp.isc.org/isc/dhcp/dhcp-4.2.2-RELNOTES)
Internet Systems Consortium DHCP Distribution
Version 4.2.2
27 July 2011
Release Notes
NEW FEATURES
ISC DHCP 4.2.x includes features that were not included in DHCP 4.1.x.
These include:
Processing the DHCP to DNS server transactions in an asynchronous fashion.
The DHCP server or client can now continue with it's processing while
awaiting replies from the DNS server.
There are a number of DHCPv6 limitations and features missing in this
release, which will be addressed in the future:
- Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported.
- DHCPv6 includes human-readable text in status code messages, in
English. A method to reconfigure or support other languages would
be preferable.
- The "host-identifier" option is limited to a simple token.
- The client and server can only operate DHCPv4 or DHCPv6 at a time,
not both. To use both protocols simultaneously, two instances of the
relevant daemon are required, one with the '-6' command line option.
For information on how to install, configure and run this software, as
well as how to find documentation and report bugs, please consult the
README file.
ISC DHCP uses standard GNU configure for installation. Please review the
output of "./configure --help" to see what options are available.
The system has only been tested on Linux, FreeBSD, and Solaris, and may not
work on other platforms. Please report any problems and suggested fixes to
<dhcp-users@isc.org>.
Changes since 4.2.2rc1
! Two packets were found that cause a server to halt. The code
has been updated to properly process or reject the packets as
appropriate. Thanks to David Zych at University of Illinois
for reporting this issue. [ISC-Bugs #24960]
One CVE number for each class of packet.
CVE-2011-2748
CVE-2011-2749
Changes since 4.2.2b1
- Strict checks for content of domain-name DHCPv4 option can now be
configured during compilation time. Even though RFC2132 does not allow
to store more than one domain in domain-name option, such behavior is
now enabled by default, but this may change some time in the future.
See ACCEPT_LIST_IN_DOMAIN_NAME define in includes/site.h.
[ISC-Bugs #24167]
- DNS Update fix. A misconfigured server could crash during DNS update
processing if the configuration included overlapping pools or
multiple fixed-address entries for a single address. This issue
affected both IPv4 and IPv6. The fix allows a server to detect such
conditions, provides the user with extra information and recommended
steps to fix the problem. If the user enables the appropriate option
in site.h then server will be terminated
[ISC-Bugs #23595]
Changelog:
NEW FEATURES
ISC DHCP 4.1.x includes several new DHCPv6 features that were not included
in DHCP 4.0.x. These include:
- Support for the rapid-commit option on the client side
- Prefix Delegation support
- IA_TA address support
- A basic DHCPv6 relay agent
- Basic and partial DHCPv6 leasequery support
There are a number of DHCPv6 limitations and features missing in this
release, which will be addressed in the future:
- Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported.
- Only a single address is supported per IA.
- DHCPv6 includes human-readable text in status code messages. These
should be configurable, and probably localized via gettext() or the
like.
- The "host-identifier" option is limited to a simple token.
- The client and server can only operate DHCPv4 or DHCPv6 at a time,
not both. To use both protocols simultaneously, two instances of the
relevant daemon are required, one with the '-6' command line option.
For information on how to install, configure and run this software, as
well as how to find documentation and report bugs, please consult the
README file.
ISC DHCP uses standard GNU configure for installation. Please review the
output of "./configure --help" to see what options are available.
The system has only been tested on Linux, FreeBSD, and Solaris, and may not
work on other platforms. Please report any problems and suggested fixes to
<dhcp-users@isc.org>.
Changes since 4.1.1
- 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]
! 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]
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
- None.
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 DHCPv6.
- 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@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'. CVE-2009-1892
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
Nordahl.
- 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.
- Fix a build error in dhcrelay, using older versions of gcc with
dhcpv6 disabled.
- 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 string').
- 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 systems.
- 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.
* 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.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.
ISC DHCP 4.1.x will have several new DHCPv6 features that were not in DHCP 4.0.x. These new features include:
* Support for the rapid-commit option on the client side
* Prefix Delegation support
* IA_TA address support
* A basic DHCPv6 relay agent
* basic DHCPv6 Leasequery support
configuration files and binaries in a number of cases. This should hopefully
fix them all. Without this patch they look in /etc only and fail to start
if the file is not present.
freely redistributable reference implementation of all aspects of
DHCP, through a suite of DHCP tools:
* A DHCP server
* A DHCP client
* A DHCP relay agent
These tools all use a modular API which is designed to be sufficiently
general that it can easily be made to work on POSIX-compliant
operating systems and also non-POSIX systems like Windows NT and
MacOS.
The DHCP server, client and relay agent are provided both as
reference implementations of the protocol and as working, fully-featured
sample implementations. Both the client and the server provide
functionality that, while not strictly required by the protocol,
is very useful in practice. The DHCP server also makes allowances
for non-compliant clients which one might still like to support.
This package contains the Base component.
