Security fix released for BIND

Number: AV15-059
Date: July 8 2015


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


Internet Systems Consortium (ISC) has released a security fix to address vulnerability CVE-2015-4620. A specially constructed zone data could cause a resolver to crash when validating. If left unpatched an attacker could cause a denial of service in BIND for clients who rely on that resolver.

Versions affected: BIND 9.7.1 -> 9.7.7, 9.8.0 -> 9.8.8, 9.9.0 -> 9.9.7, 9.10.0 -> 9.10.2-P1.

Suggested Action

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


CVE-2015-4620: Specially Constructed Zone Data Can Cause a Resolver to Crash when Validating

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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