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Which of the following is an attack that uses UDP instead of TCP traffic to cause a denial of service to the victims computer?
Smurf attack
Fraggle attack
Land attack
SYN attack
Teardrop attack
A Fraggle Attack is a denial-of-service (DoS) attack that involves sending a large amount of spoofed UDP traffic to a routerâs broadcast address within a network. It is very similar to a Smurf Attack, which uses spoofed ICMP traffic rather than UDP traffic to achieve the same goal. Given those routers (as of 1999) no longer forward packets directed at their broadcast addresses, most networks are now immune to Fraggle (and Smurf) attacks.
The SYN flood attack takes advantage of the TCP three-way handshake. This method operates two separate ways. Both methods attempt to start a three-way handshake, but not complete it. The first attack method can be achieved when the attacker sends a synchronize request, or SYN, with a spoofed IP address. When the server tries to send back a SYN-ACK request, or synchronize-acknowledge request, it will obviously not get a response. This means that the server never obtains the clientâs ACK request, and resources are left half-open. Alternatively, the attacker can just choose to not send the acknowledgement request. Both of these methods stall the server, who is patiently waiting for the ACK request. Thankfully, this hole in the three-way handshake has been patched for years, just like the ping of death attack. Should you suspect that your older devices are the subject of this attack, upgrade them immediately.
In the teardrop attack, packet fragments are sent in a jumbled and confused order. When the receiving device attempts to reassemble them, it obviously wonât know how to handle the request. Older versions of operating systems will simply just crash when this occurs. Operating systems such as Windows NT, Windows 95, and even Linux versions prior to version 2.1.63 are vulnerable to the teardrop attack. As stated earlier, upgrading your network hardware and software is the best way to stay secure from these types of attacks.
** Excuse me, the question explicitly states that the attack uses UDP while the rationale for the answer being a Teardrop Attack requires the use of TCP. Shouldn't the answer be a Fraggle Attack which does use UDP and does conform the question asked? **
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