Date: 12 June 2014
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AUSCERT External Security Bulletin Redistribution
CVE-2014-3859: BIND named can crash due to a defect in EDNS
12 June 2014
AusCERT Security Bulletin Summary
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2014-3859
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CVE-2014-3859: BIND named can crash due to a defect in EDNS printing processing
Author: Jeremy Reed
Reference Number: AA-01166
Created: 2014-05-28 13:28
Last Updated: 2014-06-11 20:45
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A specially crafted query sent to a BIND nameserver can cause it to crash with
a REQUIRE assertion error.
Document Version: 2.0
Posting date: 11 June 2014
Program Impacted: BIND
Versions affected: 9.10.0, 9.10.0-P1
A query specially crafted to exploit a defect in EDNS option processing can
cause named to terminate with an assertion failure.
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
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:
No known workarounds at this time.
There are no known active exploits.
Upgrade to the patched release most closely related to your current version of
BIND. Open source versions can all be downloaded from
BIND 9 version 9.10.0-P2
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
See our BIND Security Matrix for a complete listing of Security Vulnerabilities
and versions affected.
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
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using firstname.lastname@example.org's PGP key which can be found here:
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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
This Knowledge Base article https://kb.isc.org/article/AA-01166 is the complete
and official security advisory document.
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