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AUSCERT Security Bulletin
ASB-2010.0244
A number of vulnerabilities have been identified in BIND
3 December 2010
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AusCERT Security Bulletin Summary
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Product: BIND prior to 9.7.2-P3
BIND prior to 9.6.2-P3
BIND prior to 9.6-ESV-R3
BIND prior to 9.4-ESV-R4
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2010-3615 CVE-2010-3614 CVE-2010-3613
Member content until: Sunday, January 2 2011
OVERVIEW
A number of vulnerabilities have been identified in BIND prior to
versions 9.7.2-P3, 9.6.2-P3, 9.6-ESV-R3, 9.4-ESV-R4.
IMPACT
The vendor has provided the following description of these
vulnerabilities:
CVE-2010-3613: "Adding certain types of signed negative responses to
cache doesn't clear any matching RRSIG records already in cache. A
subsequent lookup of the cached data can cause named to crash
(INSIST)." [1]
CVE-2010-3614: "named, acting as a DNSSEC validator, was determining
if an NS RRset is insecure based on a value that could mean either
that the RRset is actually insecure or that there wasn't a matching
key for the RRSIG in the DNSKEY RRset when resuming from validating
the DNSKEY RRset. This can happen when in the middle of a DNSKEY
algorithm rollover, when two different algorithms were used to sign a
zone but only the new set of keys are in the zone DNSKEY RRset." [2]
CVE-2010-3615: "When named is running as an authoritative server for a
zone and receives a query for that zone data, it first checks for
allow-query acls in the zone statement, then in that view, then in
global options. If none of these exist, it defaults to allowing any
query (allow-query {"any"};). With this bug, if the allow-query is not
set in the zone statement, it failed to check in view or global options
and fell back to the default of allowing any query. This means that
queries that the zone owner did not wish to allow were incorrectly
allowed. This bug doesn't affect allow-recursion or allow-query-cache
acls, since they are not relevant to a zone for which the server is
authoritative." [3]
MITIGATION
The vendor recommends upgrading to the latest version of BIND to
correct these vulnerabilities.
REFERENCES
[1] BIND: cache incorrectly allows a ncache entry and a rrsig for the
same type
https://www.isc.org/software/bind/advisories/cve-2010-3613
[2] BIND: Key algorithm rollover bug in bind9
https://www.isc.org/software/bind/advisories/cve-2010-3614
[3] BIND: allow-query processed incorrectly
https://www.isc.org/software/bind/advisories/cve-2010-3615
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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