Juniper Security Update – NetScreen Firewall

Number: AV14-051
Date: 20 June 2014


The purpose of this advisory is to bring attention to a Software security update for Juniper's ScreenOS product.


A Denial of Service (DoS) issue has been found in Juniper Networks NetScreen Firewall products. This issue can cause the device to crash and reboot. Repeated exploitation of this issue could result in a sustained denial of service on the device. The issue is not encountered unless a feature is enabled that requires the device to use its built-in DNS lookup client.

A software update for ScreenOS has been released to resolve this issue. The release containing the fix includes ScreenOS 6.3r17 and subsequent releases.

Suggested Action

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


Juniper Security Bulletin

CVE-2014-3813 Reference

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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