one_gadget
Command-line tool that finds one-gadget RCE entry points in glibc binaries and outputs their register constraints clearly.
Technical Architecture & Overview
one_gadget is an open-source tool that finds one-gadget execve("/bin/sh", ...) candidates in glibc binaries. It reports the register and memory constraints required for each gadget to succeed, making it a standard tool in modern CTF and exploit development workflows targeting glibc-based systems.
Targeted Technical Use Cases
Finding one-gadget RCE candidates in specific glibc versions during exploit development.
Evaluation & Trade-offs
Core Strengths
- +Standard tool for one-gadget discovery in CTF and exploit development workflows.
- +Reports precise register and memory constraints for each candidate gadget.
- +Supports a wide range of glibc versions with regular updates.
Trade-Offs & Limitations
- -Linux-only and specific to glibc; does not work with musl or other libc implementations.
- -Gadget constraints may not be satisfiable in a given exploit context.
Defensive Security Application
Assessing the feasibility of one-gadget RCE in specific glibc versions to evaluate ASLR and libc hardening.
Frequently Asked Questions
What is one_gadget?→
one_gadget is an open-source tool that finds one-gadget execve("/bin/sh", ...) candidates in glibc binaries. It reports the register and memory constraints required for each gadget to succeed, making it a standard tool in modern CTF and exploit development workflows targeting glibc-based systems.
What is one_gadget used for?→
Finding one-gadget RCE candidates in specific glibc versions during exploit development.
What are the strengths of one_gadget?→
- +Standard tool for one-gadget discovery in CTF and exploit development workflows.
- +Reports precise register and memory constraints for each candidate gadget.
- +Supports a wide range of glibc versions with regular updates.
What are the limitations of one_gadget?→
- +Linux-only and specific to glibc; does not work with musl or other libc implementations.
- +Gadget constraints may not be satisfiable in a given exploit context.
How is one_gadget used defensively?→
Assessing the feasibility of one-gadget RCE in specific glibc versions to evaluate ASLR and libc hardening.