Dns Missing Spf Record
Description
This detector identifies domains missing SPF (Sender Policy Framework) records in their DNS configuration. SPF records help prevent email spoofing by specifying which mail servers are authorized to send email on behalf of the domain, improving email security and reducing the risk of phishing attacks using the domain name.
Detection Strategy
• Queries the DNS TXT records for the target domain
• Searches through all TXT records looking for entries that start with 'v=spf1' (case-insensitive)
• Reports a vulnerability if no SPF record is found among the domain's TXT records
• Skips detection for localhost/local domains as SPF records are not applicable for local development
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