UDP-based Amplification Attacks

Number: AL14-002
Date: 10 February 2014


The purpose of this alert is to bring attention to Distributed Reflective Denial of Service Attacks (DRDoS) using User Datagram Protocol (UDP) for amplification.


UDP based amplification attacks are on the rise, resulting in DRDoS attacks. Please refer to US-CERT’s Alert (TA14-017A) for a list of UDP protocols affected, the bandwidth amplification factor for each and suggestions for mitigation.

UDP-based Amplification Attacks (TA14-017A)

Suggested Action

CCIRC recommends organizations review common best practices to harden UDP servers as suggested in TA14-017A.

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
E-mail: ps.communications-communications.sp@canada.ca

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