hunt-race-condition
Hunting skill for race condition vulnerabilities. Built from 12 public bug bounty reports including modern HTTP/2 single-packet attack cases (James Kettle DEF CON 2023 "Smashing the State Machine"; RyotaK / Flatt Security 10,000-request first-sequence-sync expansion 2024). Covers coupon double-redemption, gift-card double-spend, MFA-OTP-validate race, account-create race, faucet/crypto token double-mint, email-activation race, vote/upvote inflation, password-reset token race, rate-limit bypass via concurrent requests. Use when hunting race conditions, TOCTOU bugs, MFA-bypass-via-timing.
72
88%
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Critical
Do not install without reviewing
Security
4 findings: 1 critical severity, 1 high severity, 2 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
This document contains explicit, operational exploitation guidance (single-packet HTTP/2, Turbo Intruder, Flatt first-sequence-sync, sample scripts) to perform race-condition attacks (double-spend, OTP/PIN brute-force, rate-limit bypass) that enable deliberate abuse and financial/authorization compromise.
W007: Insecure credential handling detected in skill instructions.
What this means
The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.
Why it was flagged
The skill includes command- and code-level examples that embed session cookies and plaintext passwords directly (e.g., curl -H "Cookie: session=YOUR_SESSION", Python headers with Cookie, request body with password), which requires inserting secret values verbatim into generated requests/commands and therefore poses a high exfiltration risk.
W009: Direct money access capability detected (payment gateways, crypto, banking).
What this means
The skill is specifically designed for direct financial operations, giving the agent the ability to move money or execute financial transactions — such as payment processing, cryptocurrency operations, banking integrations, or market order execution.
Why it was flagged
The skill is explicitly targeted at exploiting financial flows: it teaches how to double-spend/redeem coupons, gift cards, promo codes, wallet balances and even crypto faucet transfers by using last-byte-sync / parallel-request primitives. It contains concrete payloads and tooling (curl, Turbo Intruder, Python examples) aimed at causing duplicate monetary transactions and cites real Stripe/crypto cases. Because the documentation's primary purpose includes instructing how to trigger duplicate/unauthorized financial actions (redeem/checkout/transfer), it grants Direct Financial Execution capability.
W013: Attempt to modify system services in skill instructions.
What this means
The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.
Why it was flagged
The skill explicitly instructs running a privileged packet-capture command using sudo (sudo tcpdump ...), which asks the operator/agent to obtain elevated privileges and thus risks compromising the host state.
- Repository
- elementalsouls/Claude-BugHunter
- Commit
6b9c96e
- Audited
- Security analysis
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