CVE-2014-3859: named can crash due to a defect in EDNS printing processing
Michael McNally
mcnally at isc.org
Wed Jun 11 21:58:19 UTC 2014
A specially crafted query sent to a BIND nameserver can cause it
to crash with a REQUIRE assertion error.
CVE: CVE-2014-3859
Document Version: 2.0
Posting date: 11 June 2014
Program Impacted: BIND
Versions affected: 9.10.0, 9.10.0-P1
Severity: Critical
Exploitable: Remotely
Description:
A query specially crafted to exploit a defect in EDNS option
processing can cause named to terminate with an assertion failure.
Impact:
Both authoritative and recursive servers are vulnerable to this
defect. Exploitation of this condition can cause a denial of
service in nameservers running affected versions of BIND 9.10.
Access Control Lists do not provide protection.
The bug which causes this condition is in libdns; consequently
in addition to the named server process other applications (for
example: dig and delv) built using the libdns library from the
affected source distributions can also be forced to crash with
assertion failures triggered in the same fashion.
CVSS Score: 7.8
CVSS Equation: (AV:N/AC:L/Au:N/C:N/I:N/A:C)
For more information on the Common Vulnerability Scoring System and
to obtain your specific environmental score please visit:
http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2&vector=(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Workarounds:
No known workarounds at this time.
Active exploits:
There are no known active exploits.
Solution:
Upgrade to the patched release most closely related to your
current version of BIND. Open source versions can all be
downloaded from http://www.isc.org/downloads.
BIND 9 version 9.10.0-P2
Acknowledgements:
ISC would like to thank Codenomicon for detecting this issue.
Document Revision History:
1.0 Phase One, Advance Notification, 04 June 2014
2.0 Phase Four, Public Disclosure, 11 June 2014
Related Documents:
See our BIND Security Matrix for a complete listing of Security
Vulnerabilities and versions affected.
https://kb.isc.org/article/AA-00913/0
If you'd like more information on our product support or about our
Subscription versions of BIND, please visit
http://www.dns-co.com/solutions/.
Do you still have questions? Questions regarding this advisory
should go to security-officer at isc.org. To report a new issue,
please encrypt your message using security-officer at isc.org's PGP
key which can be found here:
https://www.isc.org/downloads/software-support-policy/openpgp-key/.
If you are unable to use encrypted email, you may also report new
issues at:
https://www.isc.org/mission/contact/.
Note: ISC patches only currently supported versions although when
possible we indicate EOL versions affected. The latest versions
of ISC software can always be found on our web site at
http://www.isc.org/downloads/. There you will find additional
information about each release.
ISC Security Vulnerability Disclosure Policy:
Details of our current security advisory policy and practice can
be found here: ISC Software Defect and Security Vulnerability
Disclosure Policy -- https://kb.isc.org/article/AA-00861
This Knowledge Base article https://kb.isc.org/article/AA-01166 is
the complete and official security advisory document.
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