A program sends a flood of UDP packets from a spoofed host to a server on the subnet sweeping through all the known UDP ports looking for closed ports. This will cause the server to reply with an ICMP port unreachable message. Which attack is this?
- TCP reset attack
- UDP flood attack
- TCP SYN Flood attack
- DoS attack
- TCP session hijacking
Explanation: A UDP flood attack sends a flood of UDP packets to the target’s closed ports causing the target to reply with ICMP port unreachable messages. Because there are many closed ports on the server, this creates a lot of traffic on the segment, which uses up most of the bandwidth. The result is very similar to a DoS attack.
Exam with this question: 3.7.6 Check Your Understanding - TCP and UDP Vulnerabilities
Exam with this question: 16.3.6 Check Your Understanding - TCP and UDP Vulnerabilities
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