DNS exploitation

Nullcon HackIM CTF Goa 2026 – DragoNflieS

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Category: DNS / Network Security Difficulty: Medium 1. Challenge Overview The challenge provided a DNS server at 52.59.124.14:5053. The hint stated that “latest and greatest DNS features” now allow internal networks to resolve names without VPNs or Firewalls. This was a clear pointer toward EDNS Client Subnet (ECS) or DNS over QUIC (DoQ). 2. Vulnerability … Read more

Nullcon HackIM CTF Goa 2026 – DiNOS

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Category: DNS / Misc Difficulty: Medium 1. Challenge Overview The challenge provided a custom DNS server (52.59.124.14:5052) with the hint: “Some flag escaped its enclosure. Now it is mixed up with the herd(dinos.nullcon.net).” The goal was to locate the flag hidden within a large number of DNS records. 2. Vulnerability Analysis Step 1: Initial Connectivity … Read more