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[W-6] Unauthenticated reachability-state poisoning — payout pause + recovery lock

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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
25/100
Tipo di issue
Bug
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
go
Ambito
backend, payments, security

Direzione di ricerca

Start by checking whether the finding still reproduces on current main: find where MarkUnreachable is called on payment errors in merchant.go (around lines 303-305 and 495-500) and how consecutiveSuccesses is reset in mint_health_tracker.go (lines 162-171). Reproduce the payout pause and recovery lock with a test that sends a failing payment and then one probe failure. Done means either a confirmed repro with a fix that marks unreachable only on network-class errors and triggers the set-changed check, or a note that the issue no longer applies.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

Migrated from Amperstrand/tollgate-module-basic-go#75 as part of the fork retirement — OpenTollGate/tollgate-module-basic-go is the single source of truth; the fork issue carries the original discussion and any lab evidence. Retirement plan: #758.]

LOW-MEDIUM: Reachability-state poisoning attack. MarkUnreachable is called on any payment error, causing the payout routine to pause (merchant.go:303-305) and resetting consecutiveSuccesses forever (mint_health_tracker.go:162-171). This locks recovery indefinitely when combined with one genuine probe failure.

One unauthenticated POST suffices (README config typically has exactly 1 accepted mint). The Phase-1 claim of "invalid tokens → all mints unreachable → degraded mode → payment outage ~15 min" was downgraded after PoC — the downgrade callback doesn't fire while the mint is healthy, but the payout pause and recovery lock are still exploitable.

Fix: Only mark unreachable on network-class errors; fire the set-changed check from MarkUnreachable.

Evidence: /home/ubuntu/src/tollgate_audit_report_2026-08-26.md §7, line 151
File references: merchant.go:495-500, mint_health_tracker.go:162-171

Migrated 2026-10-09. Applicability to current upstream main (4614ac2, post-rc1) was not re-verified during migration — confirming whether the finding still reproduces upstream is this issue's first task.

Lingua principale
Go
Stelle
12
Fork
14
Merge medio
1g 8h
PR unite (30g)
201

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  4. Apri una pull request che faccia riferimento al numero della issue.

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