Subdomain Takeover
Subdomain takeover is a type of security issue in computer networks where a cyber attacker can take control of a subdomain that is no longer in use by the original owner. Essentially, this happens when the domain is not properly maintained by its owner or when the owner moves to different services or systems, leaving the original subdomain behind.
In a takeover, an attacker can manipulate the domain for a variety of malicious purposes, including inserting malware or phishing pages.
This type of attack happens most often when a third-party service is used for a subdomain without proper monitoring, making it difficult to determine if the subdomain is still in use. In order to avoid this type of attack, website owners should maintain proper controls and regularly check their subdomains to ensure they are not vulnerable to takeover.
In summary, a subdomain takeover is when an attacker takes over a subdomain no longer in use by another party, and subsequently uses it to launch a malicious attack.