Do you understand DNS attacks and is your network protected against them? DNS was primarily created to respond to requests accurately and efficiently, not to speculate on their purpose. As a result, DNS is prone to hacks and serious vulnerabilities.
In a Domain Name System (DNS) attack, a malicious actor tries to attack the network’s DNS or use its built-in advantages to launch a larger-scale attack. A well-planned DNS attack has the potential to destroy an organization. This article will cover the four main types of DNS attacks that will lead to enterprise cybersecurity breaches in 2022.
DNS tunnel
Encrypting data from other applications or protocols in DNS requests and responses is known as DNS tunneling. Simply put, it consists of a lot of data that can hijack a DNS server and allow hackers to take control of the remote server and its applications.
DNS tunnels often rely on the hacked system’s external network connection as a backdoor to the internal DNS server with network access. It is also necessary to control the server and domain, act as an authoritative server, and perform server-side tunneling and data transfer executables.
DNS amplification
Distributed Denial of Service (DDoS) occurs when DNS amplification is hacked and floods the target with DNS response traffic allowing them to use publicly available open DNS servers.
However, the hacker sends a DNS lookup request to an open DNS server and spoofs the source address to get the destination address. The DNS record response is propagated to the new target, but is already affected by the attacker when the DNS server hands it over.
DNS flood attack
User Datagram Protocol (UDP) flooding can be detected using DNS flooding. Hackers launch fake DNS request packets at very high speeds before spoofing a bunch of IP addresses.
The target’s DNS server starts responding to all requests because they appear to be valid. A large number of requests can destroy the DNS server. Most DNS attackers use a lot of network resources, modeling a particular DNS infrastructure that breaks or crashes, causing Internet access to be disrupted.
DNS spoofing
DNS spoofing, also known as DNS cache poisoning, is a method of using updated DNS records to redirect network traffic to a malicious website that appears to be the desired location. Users are required to enter their accounts after arriving at the fake location.
Essentially, they provide an opportunity for a threat actor to steal certain credentials as well as certain sensitive information that is entered into a fake login form after they enter it. Similarly, these malicious websites are used to download viruses to the user’s device and this allows the hacker to perform the hacking process to get the data from the user’s device.
final thought
There are several ways to mitigate DNS attacks. One way is to limit the DNS query rate. This will prevent a DDoS attack as it takes time to reach the query limit. Another way is to use feedback policies.
This will allow administrators to control what information is provided in response to DNS queries. For example, an administrator can choose to provide information only about the A record, but not the CNAME record.
Finally, another way to mitigate DNS attacks is to use an inbound filter. This will filter illegal DNS traffic before reaching the DNS server. These are just some of the ways to mitigate large-scale DNS attacks.
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Source: tiengtrunghaato.edu.vn