OpenSSL Vulnerability

Number: AL16-013
Date: 22 June 2016


The purpose of this alert is to bring attention to a recently disclosed vulnerability in OpenSSL.


CCIRC is aware of a recently disclosed vulnerability in OpenSSL.  Identified as CVE-2016-2177, this vulnerability can allow a remote unauthenticated attacker to cause denial of service conditions.  Proof-of-concept exploit code has been released publicly.

CVE Reference: CVE-2016-2177

Affected Versions: OpenSSL 1.0.2h and prior

Suggested action

Due to the potential risk presented by this vulnerability, CCIRC recommends that system administrators monitor for the developer released security fix.


NIST National Vulnerability Database:  


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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