BIND Security Update

Number: AV14-049
Date: 12 June 2014


The purpose of this advisory is to bring attention to a security fix released for BIND.


ISC has released security fixes to solve a critical vulnerability in the EDNS printing processing. If left unpatched it could allow an attacker to cause a denial of service in nameservers running affected versions of BIND and Access Control Lists do not provide protection against this vulnerability. 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.

Affected software versions:

Suggested Action

CCIRC recommends that owner/operators test and deploy the vendor released updates or workarounds to affected platforms accordingly.


Note to Readers

In support of Public Safety's mission to build a safe and resilient Canada, CCIRC's mandate is to help ensure the security and resilience of the vital non-federal government cyber systems that underpin Canada's national security, public safety and economic prosperity. As Canada's computer security incident response team, CCIRC is Canada's national coordination centre for the prevention and mitigation of, preparedness for, response to, and recovery from cyber incidents on non-federal government systems. It does this by providing authoritative advice and support, and coordinating information sharing and incident response.

Please note, CCIRC PGP key has recently been updated.

For general information, please contact Public Safety Canada's Public Affairs division at:

Telephone: 613-944-4875 or 1-800-830-3118
Fax: 613-998-9589

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