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             AUSCERT External Security Bulletin Redistribution

        CVE-2014-3859: BIND named can crash due to a defect in EDNS
                            printing processing
                               12 June 2014


        AusCERT Security Bulletin Summary

Product:           BIND
Publisher:         ISC
Operating System:  UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-3859  

Original Bulletin: 

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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 
Views: 129 
Created: 2014-05-28 13:28 
Last Updated: 2014-06-11 20:45 	
0 Rating/ Voters 	

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


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.   

Active exploits:

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

Related Documents:

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 
security-officer@isc.org.  To report a new issue, please encrypt your message
using security-officer@isc.org's PGP key which can be found here: 
If you are unable to use encrypted email, you may also report new issues at: 

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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Uncontrolled copies may lack important information, be out of date, or contain
factual errors.

© 2001-2014 Internet Systems Consortium

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