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This project involves working on a custom-built device that runs a Linux-based but completely closed (custom) firmware. The device currently has no root access, no terminal access, and no SSH service available. Firmware updates are performed via USB using UBI format, and only specific partitions are updated. The UBI image can be extracted, the root filesystem (rootfs) can be accessed, and it can be repackaged and flashed back to the device. However, so far it has not been possible to successfully integrate SSH access into the firmware. This project requires a freelancer with strong experience in firmware reverse engineering and embedded Linux systems.
ID do Projeto: 40151280
21 propostas
Projeto remoto
Ativo há 21 dias
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21 freelancers estão ofertando em média $3.928 USD for esse trabalho

As a seasoned Electrical Engineer and Master's graduate in Embedded Systems, I possess the exact skills and expertise you require to modify your closed-firmware device and integrate SSH access. With years of practice in firmware reverse engineering and embedded Linux systems, my proficiencies extend to working with Linux-based, custom-built devices which will be a perfect fit for your project. Not only do my skills align perfectly with your requirements, but my approach to work exhibits a complete end-to-end development process. From conception to delivering market-ready products, I ensure robust, quality solutions that blend hardware and software seamlessly. My experience in C/C++, Linux systems, and wireless stacks (BLE, Wi-Fi, LoRa) enables me to navigate complex firmware like UBI firmware effectively. Additionally, my repertoire includes proficiency in PCB design and RF hardware which will be instrumental in manipulating the UBI image to extract the root filesystem. My understanding of IoT product engineering adds even more depth to my capacity for this project. Overall, choosing me will ensure skillful execution, elegant solutions, and on-time delivery; all these factors combined make me your ideal choice for this intricate firmware modification endeavor.
$5.000 USD em 60 dias
8,1
8,1

Do you need a tailored solution? Look no further. My name is Muhammad Awais, and as a founder of ZAWN Tech, I have built my company upon delivering bespoke digital solutions for over 7 years. One area we excel at is embedded systems and firmware development. Our expertise is not limited to just commonplace applications; we have vast experience in a variety of industries including Blockchain, Web & SaaS, eCommerce, Mobile Apps, AI & Computer Vision, Game Development and even Trading & Financial Automation. As for the Linux-based UBI Firmware project, we understand the importance of root access and SSH in accessing and modifying the firmware; even when it might seem impossible. We have experience in overcoming similar challenges using our deep knowledge in scripting and linux debugging techniques. Given the skillset needed for this project - that is debugging, documentation and shell scripting among others - my team would be an excellent fit for this task. Lastly, with retention of over 95%+ clients and 200+ recommendations in our pocket, it is clear that our solutions are both reliable and high-quality. And we guarantee the same level of commitment and dedication to your project.
$5.000 USD em 30 dias
7,1
7,1

Best Embedded Linux & UBI Image Modification Partner ⭐⭐⭐⭐⭐ Hi Fatihyrlmz, Thanks for sharing the scope clearly. I’ve supported embedded projects where custom Linux-based systems required careful modification, integration, and testing on live devices. Your project looks very doable. The goal is simple: modify your UBI-based system to add secure, functional SSH access while preserving all existing functionality and update mechanisms. ✅ How I’ll Help You Succeed 1. Review your UBI image, root file system, and update procedure before making changes. 2. Analyze the system structure to identify safe integration points for SSH and other enhancements. 3. Modify, repackage, and test the image to ensure it flashes correctly and the device boots reliably. 4. Provide clear documentation on changes made and guidance for future updates. ✅ I’ve delivered many embedded Linux projects where precision, safety, and repeatable deployment were critical, and I communicate every step to ensure smooth implementation. ✅ Before I start, one quick thing: do you have a preferred SSH implementation or any security requirements for the remote access? If you share that, feel free to message me and we can align quickly. Best, Prat PCB Must Innovations
$3.000 USD em 12 dias
6,3
6,3

Need an expert to modify your embedded UBI firmware? Look no further! I am an experienced electrical engineer who specializes in embedded systems, Linux, and microcontrollers - the precise skill set you need for this project. I have been in the field for over 10 years and have worked on more than 60 successful projects similar to yours all over the world. Having supported clients like Msolution, eMushrif, dbell, YFLab and others, I've accumulated a rich cross-cultural experience and a deep understanding of diverse project requirements. With solid expertise in firmware reverse engineering and embedded Linux systems, I’ve consistently delivered top-notch solutions tailored to unique client needs. Moreover, as a ranked freelancer on several platforms, I am known for exceeding expectations while meeting tight deadlines. Let’s join forces to design a fully integrated firmware for your device, unlocking root access, terminal access, and SSH service to make it even more powerful.
$4.000 USD em 7 dias
4,7
4,7

With a versatile background in industrial automation and vast experience in using Linux and writing scripts, I am well-equipped to take on this embedded firmware modification project. From my work in water and energy automation, I've honed my skills in process control and systems management—qualities that are essential to successfully handling your device's closed firmware. I've also meticulously operated with SIEMENS WinCC SCADA program for system monitoring, which involved managing various partitions - akin to what your project demands. Reverse engineering is no stranger to me, having worked on diverse projects that required understanding complex systems from scratch. That, coupled with my deep-rooted knowledge of Linux-based environments, places me in an advantageous position for your project. Despite the absence of security measures like SSH access presently, I'm confident that I can help you integrate this crucial feature into your custom-built device's firmware. Lastly, my extensive exposure to imaginative problem-solving combined with the use of Delta and ABB PLC programs will contribute to out-of-the-box solutions for your project’s roadblocks. With dervis at the helm, you’ll not only get meticulous attention-to-detail but also someone who will ensure seamless functioning of all parts of your device after the modification is complete. Let us server Jr Bob Juniors better
$4.000 USD em 21 dias
4,7
4,7

With over a decade of experience in web and mobile development, particularly in firmware reverse engineering and embedded Linux systems, I understand the challenges your project presents. Your need for modifying the embedded UBI firmware on a custom device with limited access aligns perfectly with my skill set. I have a proven track record in working on similar projects, with successes in integrating advanced functionalities into closed firmware systems. My expertise in firmware reverse engineering and embedded Linux systems will ensure that I can tackle the complexities of this project efficiently and effectively. If you're ready to take the next step in unlocking the full potential of your custom-built device, I am here to help. Contact me now to discuss how we can collaborate to successfully modify the embedded UBI firmware to meet your specifications.
$4.000 USD em 45 dias
3,7
3,7

Hi there,Good morning I am Talha. I can work with your project skills Scripting, Debugging, Documentation, Electronics, Reverse Engineering, Embedded Systems, Microcontroller, Shell Script, Firmware and Linux I am excited to present my proposal, which centers around a personalized approach designed to elevate your project. We will start with an in-depth consultation to gain a deep understanding of your project's unique requirements, goals, and constraints. Our commitment to customization means that we will tailor our services to align perfectly with your project, and we will explain how this approach will meet your expectations. Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$3.000 USD em 12 dias
3,4
3,4

Greetings! I’m a top-rated freelancer with 16+ years of experience and a portfolio of 750+ satisfied clients. I specialize in delivering high-quality, professional embedded UBI firmware modifying services tailored to your unique needs. Please feel free to message me to discuss your project and review my portfolio. I’d love to help bring your ideas to life! Looking forward to collaborating with you! Best regards, Revival
$3.000 USD em 30 dias
3,1
3,1

Hi, I've carefully reviewed your project requirements regarding the modification of your custom Linux-based embedded device firmware. With extensive experience in embedded Linux systems and firmware reverse engineering, I am confident in my ability to extract, modify, and repackage your UBI firmware images effectively. My approach will focus on safely integrating SSH access by carefully analyzing and modifying the root filesystem while preserving device stability. I’m familiar with working in highly constrained environments without root or terminal access and can provide clear documentation and scripting to support ongoing maintenance. I suggest an initial timeline of 14 days to complete firmware analysis, implementation, and testing to ensure a robust solution. Could you share the specific hardware model and any existing security restrictions we should consider during the firmware modification? Thanks,
$4.440 USD em 27 dias
2,4
2,4

Hi, I understand you need to modify a custom Linux-based embedded firmware with no root or SSH access, updating it through UBI format partitions. With extensive experience in firmware reverse engineering and embedded Linux systems, I can extract, modify, and repackage your UBI image effectively. I will focus on integrating SSH access securely while ensuring system stability. I propose starting with a thorough analysis of the rootfs and custom firmware structure, then implementing SSH integration and testing the updates via USB. The project can be completed within 20 days including detailed documentation. Could you please specify the hardware platform and processor architecture of the device? Best regards, Roshan
$3.800 USD em 19 dias
2,0
2,0

Hi, I’m very interested in helping you gain controlled access to this custom Linux-based firmware through careful reverse engineering. I have experience working with embedded Linux systems, UBI images, rootfs extraction, modification, and safe re-packaging for flashing. I can analyze the boot process, init scripts, services, and security constraints to identify why SSH integration is failing. I will implement a reliable access method, whether via SSH, alternative remote shell, or debug service, without breaking firmware integrity. The work will be methodical, documented, and focused on maintaining device stability. Best regards,
$4.000 USD em 7 dias
1,6
1,6

Hi, I can modify your embedded UBI firmware to enable SSH access while maintaining full device functionality. With extensive experience in embedded Linux systems, firmware reverse engineering, and UBI-based devices, I can safely extract, modify, and repackage the root filesystem for flashing. My approach includes analyzing the existing partitions, integrating secure SSH services, and testing the firmware in a controlled environment to prevent bricking. I also provide full documentation of the changes and procedures for future updates. This ensures your device gains remote access securely without compromising its closed firmware design. My expertise in shell scripting, debugging, and embedded system workflows makes me well-suited to complete this project efficiently and reliably. Best, Justin
$4.000 USD em 7 dias
0,0
0,0

EMBEDDED UBI SYSTEM MODIFICATION Dear Fatihyrlmz, You’re working with a custom-built Linux-based device—not an off-the-shelf system, but a fully embedded platform with restricted access and tightly controlled updates, where reliable modification of the UBI image is critical. This is exactly the type of multidisciplinary, production-grade embedded system I’ve spent over a decade helping teams analyze, modify, and optimize at the system level. Here’s how I would approach your project: ✅ Careful extraction and analysis of the UBI image to access the root filesystem and identify the integration points for new features such as secure shell access. ✅ Structured modification workflow that preserves device stability while ensuring all updates remain flashable via the existing USB-based UBI process. ✅ Verification and testing of the modified system to confirm successful integration, maintain partition integrity, and ensure the device boots reliably without compromising existing functionality. I have 11+ years of experience in embedded Linux, custom system analysis, and reverse engineering, working across secure, constrained devices and production-grade embedded systems. Question: Are there specific partitions or device constraints that must remain untouched during modification, or is the full rootfs open for adjustments? I’d be happy to discuss the technical approach and help you implement a reliable, production-ready modification of the UBI-based system. Best regards, Avi Gupta
$3.000 USD em 14 dias
0,0
0,0

Hi there! Have you considered whether the firmware's bootloader settings might allow for an alternative method to inject SSH without modifying the rootfs partitions? Regardless, this is definitely something that I feel confident delivering on, given my past experience. I would love to discuss your project further! Looking forward hearing from you. Kind Regards, Corné
$3.000 USD em 14 dias
0,0
0,0

Hello Fatihyrlmz, I specialize in embedded Linux firmware reverse engineering and have hands-on experience with locked-down devices using UBI/UBIFS, no root, no shell, no SSH. I’ve worked on similar custom firmware where updates were USB-based, partitions were selectively flashed, and access had to be enabled without breaking the boot chain or update mechanism. I can show demo scripts, unpack/repack pipelines, and modified init flows before we finalize the deal. What I will do Fully analyze UBI image, MTD layout, volumes, and update logic Inspect rootfs, init system (init.d/systemd/custom), watchdogs Identify why SSH integration failed (libs, permissions, init order, RO FS, SELinux, missing devices) Integrate lightweight SSH (Dropbear/OpenSSH) or controlled debug shell Repack, flash, and verify persistence across reboots/updates Document every change for safe future updates Techniques & Expertise UBI/UBIFS extraction & repacking Embedded Linux boot & init debugging BusyBox, Dropbear, custom init scripts Shell scripting & binary inspection Reverse engineering closed firmware constraints Flash-safe, non-bricking workflows Relevant Projects “Closed Linux Appliance Rootfs Access Recovery” “Custom Embedded Device Reverse Engineering” ✔ Deep embedded/Linux RE experience ✔ Careful, methodical, production-safe approach Ready to start immediately—share the firmware image and device details and I’ll enable reliable access without breaking your system.
$3.000 USD em 15 dias
0,0
0,0

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