Lack of wildcard DNS entry found

By
Febna V M
Published on
24 Jun 2018
Vulnerability
Clickjacking

A wildcard DNS is used to share some files among the domin and its sub-domins. A wildcard DNS record may be a record in an exceedingly DNS zone that may match requests for non-existent domain names. This server lacks the wildcard DNS entry. It narrows down the addresses at which the organisation hosts machines. It significantly reduces the preparatory work necessary to locate machines, map the topology and launch an attack.

Example

*.example.com. 3600 IN MX 10 host1.example.com.

Impact

The attacker can attack the domain and its sub-domains.

Mitigation / Precaution

  • Implement wildcard DNS entry
    • cpanel
      • Login to your cpanel.
      • Goto to the Subdomains icon in the Domains section.
      • Add a subdomain called *
      • Make sure to set the document root to your public_html folder.
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Written by
Febna V M
Febna V M
Cyber Security Engineer
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