Binary Exploitation (CTF / Pwn) Expert Needed – Local & Remote Exploit Development

@maxscender

I can help you. I will pinpoint the vulnerability in the source—whether it’s a stack-based overflow, format string, or heap-based primitive—and script a reliable pwntools exploit. I will specifically check for x64 stack alignment requirements (MOVAPS) to ensure the exploit doesn't fail on the remote service after working locally. I noticed the CUDA tag; if the binaries utilize GPU-accelerated libraries, I’ll verify that the ROP chain or shellcode accounts for that specific execution environment. I’ll handle PIE/ASLR bypasses using the provided libc to ensure consistent exploitation across both targets.

@durgesh8527

As a seasoned full-stack developer with over 12 years of experience, my skills extend far beyond just designing and implementing software solutions. My proficiency in C Programming and Python, combined with a deep-rooted understanding of web and backend systems like Linux ELF, x86_64 and Python (pwntools) for exploit scripts makes me the perfect fit for this project. In terms of binary exploitation, I have extensive prior experience solving CTF and pwn challenges similar to the ones mentioned. I'm also well-versed in using GDB / pwndbg / gef and am quite familiar with protecting against NX, PIE, RELRO. The fact that I can grasp requirement nuances quickly means that our collaboration will yield efficient results with minimal back-and-forth. Given the complexity and need for strategic thinking required in projects like these, my 12 years of experience will undoubtedly prove beneficial. My unique positioning as someone who can handle end-to-end software solutions – from analyzing vulnerabilities to developing exploits – is invaluable here. I am confident in my ability to complete each task bringing along detailed explanations of vulnerabilities, exploitation steps, and freshly obtained flags.

@digilogies

As a seasoned and talented web developer with over six years of experience, I have acquired profound skills in Linux and Python programming that make me the optimal candidate for this project. Not only am I well-versed in frontend (React.js, Vue.js) and backend (Django, Node.js) development, but I also possess a deep understanding of the exploitation techniques you seek expertise in - binary exploitation (pwn) being one of them. Most notably, I have an impeccable track record in delivering results-focused projects: 850+ projects completion, 20000+ hours worked, with a high client rehire rate on Freelancer.com. This serves to demonstrate my ability to understand project goals while ensuring high-quality results are delivered within agreed-upon deadlines. Moreover, my extensive knowledge and usage of pwn tools and protections such as NX, PIE, RELRO will allow me to analyze your project binaries effectively and develop strong exploits for each challenge while ensuring their usability both locally and against the remote service. Choosing me means prioritizing your project's success through an experienced hand. Let’s discuss how we can maximize this opportunity!

@ivicab6

As a Full-stack engineer, I have 6+ years of professional experience building and securing various aspects of web applications which required binary exploitation capabilities. Although I have not specifically done CTF or Pwn challenges in the past, my broad skill set allows me to understand and adapt to new concepts quickly. My experience in understanding system-to-system workflows, reducing manual work and operational errors strongly aligns with the goals of your project. Moreover, I am highly skilled in Python and have extensive experience in utilizing libraries like pwntools, which would be crucial for developing working exploits efficiently. Finally, while the task budget is modest, it's important to understand that binary exploitation can be a complex and time-consuming process and as such requires both expertise and patience. I assure you of both. Together, we can get your job done effectively and efficiently

@cindyviorinar

Hi, I am Cindy Viorina and I specialize in binary exploitation and pwn-style CTF work. I have read your request for two x86_64 ELF challenges with source and libc provided and remote services available. I will analyze each binary with GDB/pwndbg, identify vulnerabilities, build pwntools exploits, and validate them locally and against the remote service until they reliably call the internal flag function. Technically, I will use static source review, dynamic debugging to confirm offsets and gadgets, leak strategies as needed (format/heap/ret2libc/ROP), and scripted pwntools exploits with clear automation for local and remote targets. I can communicate in real time in your timezone and deliver a simple demo within 12 hours of start. Estimated time: 1.5 to 3 days per challenge depending on mitigations. Examples: multiple CTF pwn solves involving heap/ROP and format string chains; available on request after contact. Q1: target service IP/port and any rate limits? Q2: are both challenges identical protection levels (NX, PIE, RELRO)? Q3: any constraints on exploit size or payload delivery? Which challenge should I prioritize first and do you allow iterative uploads of partial exploits during testing? Best regards, Cindy Viorina

@mateoc72

Hi, I’m a Software Engineer with strong experience in binary exploitation and CTF challenges. You need help analyzing two ELF binaries and building working exploits for both local and remote targets—I can handle that cleanly using pwntools and proper libc-based ROP. You will get reliable scripts, clear documentation, and both flags extracted. I’ve solved similar pwn challenges involving buffer overflows and remote exploitation before. Do you already know what protections (PIE/NX/RELRO) are enabled on both binaries?

@christiaanstimie

I can help you develop reliable local and remote exploits for your CTF-style Linux ELF (x86_64) binaries. With source code available, I’ll focus on quickly understanding the vulnerability surface and crafting stable, repeatable exploits tailored to your specific challenge goals. I have hands-on experience with pwnable challenges, ROP chains, shellcode, ASLR/PIE/RELRO/stack canary bypasses, and typical CTF exploitation workflows. I’ve built and debugged exploits under realistic remote conditions, ensuring they work against both local test setups and remote servers. My approach will be to analyze the source and binaries, design the exploit strategy, validate it locally with gdb/pwndbg, then adapt and harden it for remote execution. I’ll also provide clear notes so you can understand and reuse the approach. I would love to chat more about your project! Regards