What is Memcached DDoS?

A Memcached Distributed Denial of Service (DDoS) attack is a cyber attack aimed at Memcached, a database caching system designed to speed up websites and networks. It works by flooding a website or application with traffic to crash the servers.

How does memcached attack work?

A Memcached attacks operates similarly to all DDoS amplification attacks such as NTP amplification and DNS amplification. The attack works by sending spoofed requests to a vulnerable server, which then responds with a larger amount of data than the initial request, magnifying the volume of traffic.

How was GitHub affected by DDoS attack?

Luckily, GitHub was using a DDoS protection service, which was automatically alerted within 10 minutes of the start of the attack. This alert triggered the process of mitigation and GitHub was able to stop the attack quickly. The massive DDoS attack only ended up lasting about 20 minutes.

Is Memcached safe?

Even though exposure of the memcached service has been known to be a security risk for some time, widespread exploitation to perform DDoS attacks utilizing techniques that result in very large amplification of attack traffic was not previously known to be common.

Should I enable Memcached?

If your website relies heavily on database queries, using Memcached should significantly improve its performance.

Why was GitHub attacked?

GitHub continued routing its traffic through Prolexic for a few hours to ensure that the situation was resolved. Akamai’s Shaul says he suspects that attackers targeted GitHub simply because it is a high-profile service that would be impressive to take down.

How do I disable memcache?

1 Answer

1. disable and uninstall module.
2. remove from settings. php and delete folder of module.
3. clear cache (make sure all tables are empty)

Is Memcached free?

Memcached is free and open-source software, licensed under the Revised BSD license.

What is Memcached in codeigniter?

High-performance, distributed memory object caching system, intended for use in speeding up dynamic web applications. The use of memcached is to speed-up the websites by using the memory space of our unused domains and store the database query results in the cache and minimize the application-database interaction.

What is Memcached siteground?

The Memcached service, that is part of SuperCacher, uses our own implementation of the popular Memcached system. It speeds up database calls, API calls, and page rendering by storing data and objects in the server’s RAM to reduce the number of times a database is queried.

Can Memcached be exploited for DDoS attacks?

Memcached can speed up websites, but a memcached server can also be exploited to perform a DDoS attack. What is a DDoS Attack? What is a DDoS Botnet? What is a DDoS Attack? What is a DDoS Botnet? What is a memcached DDoS attack?

How does a Memcached attack work?

A Memcached attacks operates similarly to all DDoS amplification attacks such as NTP amplification and DNS amplification. The attack works by sending spoofed requests to a vulnerable server, which then responds with a larger amount of data than the initial request, magnifying the volume of traffic.

Does Memcached support UDP?

By default, memcached has UDP support enabled, potentially leaving a server vulnerable. Firewall memcached servers – by firewalling memcached servers from the Internet, system administrators are able to use UDP for memcached if necessary without exposure.

How does a firewall prevent DDoS attacks?

Firewall memcached servers – by firewalling memcached servers from the Internet, system administrators are able to use UDP for memcached if necessary without exposure. Prevent IP spoofing – as long as IP addresses can be spoofed, DDoS attacks can make use of the vulnerability to direct traffic to a victim’s network.