Summary of Critical Vulnerability Patches in Bash

Number: AV14-079
Date: 1 October 2014


The purpose of this Advisory is to summarize the recently disclosed vulnerabilities in Bash and list the patches available for these vulnerabilities.


CCIRC is aware of several highly critical vulnerabilities in Bash. Due to the complexity of vulnerabilities identified and associated patches for various vendors, CCIRC is providing this advisory as a central location to obtain the most up to date information.

Internet facing services that leverage Bash are considered at high risk of exploitation, such as but not limited to, Apache cgi-bin and OpenSSH. Other services that may use Bash are web servers, load balancers, perimeter security devices, VOIP Servers, firewalls, VPN, DHCP servers, routers and switches.

Distribution Updates:

The National Vulnerability Database (NVD) provides a summary for each vulnerability and references to advisories, solutions and tools. CCIRC recommends monitoring these links closely for updates to vendor patches.

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.
• Patch systems at the earliest possible opportunity and verify that the patch was successful. Applying the system patches is the best defense against exploitation of these vulnerabilities.


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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