exploit_build_stack_pivot
Find and assemble stack pivot gadgets from a binary. Stack pivots redirect the stack pointer (ESP/RSP) to a controlled buffer, enabling ROP chains when limited stack space is available. Detects xchg(add/sub/mov,sp), push/pop(sp), leave, and add sp,N pivot patterns.
This record as markdown: /tools/io-github-vmoranv-jshookmcp/exploit-build-stack-pivot.md
What exploit_build_stack_pivot does on Jshookmcp
AI agents invoke exploit_build_stack_pivot to trigger actions in Jshookmcp. 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 exploit_build_stack_pivot is rated High
This tool enables construction of exploit primitives (stack pivots) that redirect execution flow and facilitate arbitrary code execution attacks. While it analyzes and assembles gadgets rather than directly executing code, it is a core component of building ROP chains, making it an Execute-category tool.
From the tool's definition Tool description states it 'assemble[s] stack pivot gadgets' and 'redirect[s] the stack pointer', which are operations that manipulate memory and control flow during code execution.
Attacks that exploit this kind of access
The rule that runs exploit_build_stack_pivot safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Jshookmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For exploit_build_stack_pivot, this is the rule to start with:
exploit_build_stack_pivot 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 Jshookmcp, apply this rule, and every exploit_build_stack_pivot call is checked against it from then on.
Questions about exploit_build_stack_pivot
Find and assemble stack pivot gadgets from a binary. Stack pivots redirect the stack pointer (ESP/RSP) to a controlled buffer, enabling ROP chains when limited stack space is available. Detects xchg(add/sub/mov,sp), push/pop(sp), leave, and add sp,N pivot patterns. It is categorised as a Execute tool in the Jshookmcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Jshook MCP server in PolicyLayer and add a rule for exploit_build_stack_pivot: 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 Jshookmcp. Nothing to install.
exploit_build_stack_pivot 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 exploit_build_stack_pivot 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 exploit_build_stack_pivot. 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.
exploit_build_stack_pivot is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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