john_crack
A execute tool on the Hexstrike Ai MCP server.
This record as markdown: /tools/hexstrike-ai/john-crack.md
What john_crack does on Hexstrike Ai
AI agents invoke john_crack to trigger actions in Hexstrike Ai. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why john_crack is rated High
John the Ripper is a well-known password cracking tool. Running it constitutes executing an offensive security operation that can compromise credentials. The server context (offensive pentesting, bug bounty automation) confirms this is an active execution tool. Empty description lowers confidence slightly, but the name is highly indicative. Severity is critical due to the potential for credential compromise at scale.
From the tool's definition Tool name 'john_crack' strongly implies John the Ripper password cracking execution. Server description confirms 150+ offensive cybersecurity tools for automated pentesting.
Attacks that exploit this kind of access
The rule that runs john_crack safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Hexstrike Ai, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For john_crack, this is the rule to start with:
john_crack stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Hexstrike Ai, apply this rule, and every john_crack call is checked against it from then on.
Questions about john_crack
john_crack is a execute tool on the Hexstrike Ai MCP server. It is categorised as a Execute tool in the Hexstrike Ai MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Hexstrike Ai MCP server in PolicyLayer and add a rule for john_crack: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Hexstrike Ai. Nothing to install.
john_crack is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the john_crack rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for john_crack. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
john_crack is provided by the Hexstrike Ai MCP server (0x4m4/hexstrike-ai). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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