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hunt-tls-network

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Hunt TLS/SSL and DNS misconfigurations — missing HSTS (downgrade attack), weak cipher suites, expired/invalid certificates, mTLS bypass, missing SPF/DKIM/DMARC (email spoofing), DNS Zone Transfer (AXFR), dangling CNAME subdomain takeover, CAA records. Most of these are Info/Low on their own — this skill is opinionated about which findings actually pay (spoofable DMARC with delivered-to-inbox proof, AXFR returning internal hosts, dangling-CNAME takeover) versus which get rejected as best-practice noise (missing CAA, missing HSTS with no MitM position). Use during recon to find infrastructure weaknesses, and to TRIAGE them honestly before reporting.

knowledge/Claude-BugHunter/skills/hunt-tls-network/SKILL.md

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Nov 5, 2026
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Apache-2.0

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# HUNT-TLS-NETWORK — TLS/SSL & DNS Security

## Reality Check (Read First)

Most findings in this class are **Info/Low and routinely rejected** as "best-practice" / "missing-hardening" by triage. This skill exists to stop you wasting a submission. Two questions before you report anything here:

1. **Is there a real victim and a real action?** "Missing HSTS" is not a vulnerability — *demonstrated session-cookie capture from a victim you MitM'd* is. "Missing CAA" is never a vulnerability you can demonstrate.
2. **Does the program accept it?** Many programs explicitly list missing SPF/DMARC, missing security headers, weak ciphers without exploit, and CAA as **out of scope**. Read scope first; quote the in-scope line in your report.

**What actually pays in this class (in order):**
- **Dangling-CNAME / dangling-A subdomain takeover** — you control content on `target.com` subdomain. Real impact, real bounty. (Owned in depth by `hunt-subdomain`; covered here for the TLS/DNS recon angle.)
- **Spoofable DMARC, proven by delivered-to-inbox email** — not "p=none exists" but an actual mail from `ceo@target.com` landing in a real inbox with a passing/none DMARC verdict in the headers.
- **DNS AXFR returning internal hosts** — full internal hostname/IP map. Concrete recon value, often Medium.
- **mTLS / client-cert bypass on an internal service** — reaching authenticated-only functionality without the cert. Real auth bypass = High.