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Writeups

Notes from the lab

CTF write-ups, CVE briefs, and notes from hands-on security labs, defensive research, and systems engineering. I publish when I finish something worth sharing.

WriteupAug 12, 2026

DNS Spoofing in a Lab: What Scapy Teaches You About Trust

Notes from building a custom DNS spoofer in an isolated lab. What I learned about why DNS is the protocol we love to break.

#scapy#networking#lab#security
CVE BriefAug 8, 2026

CVE Brief: Stack-Based Buffer Overflow in Legacy VPN Appliances

A concise breakdown of a pre-auth stack-based buffer overflow affecting legacy VPN gateways — including its impact, affected deployments, and mitigations.

#cve#vulnerability#analysis
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