GnuTLS releases security update

Number: AV14-013
Date: 05 March 2014


The purpose of this advisory is to bring attention to the vulnerability affecting certificate verification functions in the GnuTLS.


GnuTLS has issued an update to address a vulnerability in their certificate verification function. An attacker could use a forged X509 certificate to bypass validation checks. This can result in malicious activity such as a man in the middle attack.

Suggested action

CCIRC recommends that system administrators identify their affected assets and potential interdependencies with their organization’s critical services, and follow their patch management process 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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