1. Very large RRSIG RRsets included in a negative cache can trigger
an assertion failure that will crash named (BIND 9 DNS) due to an
off-by-one error in a buffer size check.
This bug affects all resolving name servers, whether DNSSEC validation
is enabled or not, on all BIND versions prior to today. There is a
possibility of malicious exploitation of this bug by remote users.
2. Named could fail to validate zones listed in a DLV that validated
insecure without using DLV and had DS records in the parent zone.
Add a patch provided by ru@ and confirmed by ISC to fix a crash at
shutdown time when a SIG(0) key is being used.
* Zones may be dynamically added and removed with the "rndc addzone"
and "rndc delzone" commands. These dynamically added zones are
written to a per-view configuration file. Do not rely on the
configuration file name nor contents as this will change in a
future release. This is an experimental feature at this time.
* A new command "rndc secroots" was added to dump a combined summary
of the currently managed keys combined with statically configured
trust anchors.
* Added support to load new keys into managed zones without signing
immediately with "rndc loadkeys". Added support to link keys with
"dnssec-keygen -S" and "dnssec-settime -S".
the following security vulnerabilities.
For more information regarding these issues please see:
http://www.isc.org/announcement/guidance-regarding-dec-1st-2010-security-advisories
1. Cache incorrectly allows ncache and rrsig for the same type
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3613
Affects resolver operators whose servers are open to potential
attackers. Triggering the bug will cause the server to crash.
This bug applies even if you do not have DNSSEC enabled.
2. Using "allow-query" in the "options" or "view" statements to
restrict access to authoritative zones has no effect.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3615
Affects authoritative server operators who wish to generally
restrict queries to their authoritative zones, and are running
9.6.2-P2 or any version of 9.7.x. The bug will allow unauthorized
end users to receive answers to queries they should not.
3. Key algorithm rollover
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3614
Affects resolver operators who have 9.7.2-P2 installed,
are validating with DNSSEC, and querying zones which are
in a key rollover period. The bug will cause answers to
incorrectly be marked as insecure.
For the port:
1. Add CONFLICT for the ../bind-tools port
2. Switch to pkg-install to create the symlinks to /etc/namedb/ as
requested in [1]
PR: ports/151635 [1]
Submitted by: Benjamin Lee <ben@b1c1l1.com> [1]
If a query is made explicitly for a record of type 'RRSIG' to a validating
recursive server running BIND 9.7.1 or 9.7.1-P1, and the server has one or
more trust anchors configured statically and/or via DLV, then if the answer
is not already in cache, the server enters a loop which repeatedly generates
queries for RRSIGs to the authoritative servers for the zone containing the
queried name.
CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0213
CERT: http://www.kb.cert.org/vuls/id/211905
Versions affected: 9.7.1, 9.7.1-P1
Severity: High
Exploitable: remotely
http://www.isc.org/software/bind/advisories/cve-2010-0213
code where the 9.7.x series tightened its adherence to the DNS protocol
as written, vs. the 9.6.x series which was more liberal in what it accepted.
Specifically:
1. Restore processing of certain forms of negative responses that do
not contain all of the required elements to avoid aggressive
re-querying of authority servers.
2. Accept answers from authority servers without the AA bit set
if they meet the other requirements of an answer packet.
More detail can be found here:
https://www.isc.org/community/blog/201007/compatibility-issues-bind-970-and-971
fix was too hasty. Employ a more robust fix that removes the _perl_ dep for
both this file and bind9.xsl.h. The pre-generated versions of these files
are identical to the newly generated ones, which is why this perl issue
never came up previously.
I still have reservations about baking the ISC DLV key into named, but given
that this was already done in 9.7.0+ at least this way we don't violate POLA.
which is a problem, however what it's doing is baking the ISC
DLV key into named which is not something I think is reasonable
to do by default.
So, instead of adding perl as a build dependency eliminate the
need for the file altogether.
This version has numerous minor bug fixes, please refer to the
CHANGES file for details. Many (but not all) of the fixes are
DNSSEC-related, and all users who are doing DNSSEC validation
are encouraged to upgrade to this version.
related to the handling of broken DNSSEC trust chains.
This fix is only necessary for those who have DNSSEC validation
enabled and configure trust anchors from third parties, either
manually, or through a system like DLV.
start testing it sooner rather than later. When the final version
is released the -devel will be removed.
Some of the new features of BIND 9.7.x are:
- Fully automatic signing of zones by "named"
- Simplified configuration of DNSSEC Lookaside Validation (DLV)
- Simplified configuration of Dynamic DNS, using the "ddns-confgen"
command line tool or the "local" update-policy option
- New named option "attach-cache" that allows multiple views to
share a single cache
- DNS rebinding attack prevention
- New default values for dnssec-keygen parameters
- Support for RFC 5011 automated trust anchor maintenance
(see README.rfc5011 for additional details)
- Smart signing: simplified tools for zone signing and key
maintenance
- Improved PKCS#11 support
