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CVE-2014-3859: BIND named can crash due to a defect in EDNS printing processing
Author: Reference Number: AA-01166 Views: 86611 Created: 2014-05-28 13:28 Last Updated: 2016-04-18 23:27 0 Rating/ Voters

A specially crafted query sent to a BIND nameserver can cause it to crash with a REQUIRE assertion error.

Document Version:          
Posting date: 
11 June 2014
Program Impacted: 
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 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:


No known workarounds at this time.   

Active exploits:

There are no known active exploits.  


Upgrade to the patched release most closely related to your current version of BINDOpen 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

Related Documents:

See our BIND Security Matrix for a complete listing of Security Vulnerabilities and versions affected.

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