Stories with Tag Jailbreak

• Tachy0n: The Last 0day Jailbreak

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  Posted: 2025-05-24 19:50:41

  Verbose tl;dr

  Tachy0n is a permanent, unpatchable jailbreak for all bootroms from checkm8-vulnerable devices (A5-A11 on iOS 14.x). Leveraging a hardware vulnerability, it modifies the Secure Enclave Processor (SEP) firmware, enabling persistent code execution even after updates or restores. This effectively removes Apple's ability to revoke the jailbreak through software updates. While powerful, Tachy0n is primarily a research project and a proof-of-concept, currently lacking the user-friendly tools of a typical jailbreak. It aims to lay the groundwork for future jailbreaks and serve as a secure platform for experimentation and research on Apple's security systems.

  Siguza's blog post, titled "Tachy0n: The Last 0day Jailbreak," details the culmination of a seven-year journey culminating in the development and release of a potent jailbreak exploit for iOS devices. The exploit, dubbed "checkm8," targets a vulnerability within the BootROM, a piece of read-only memory responsible for the earliest stages of the device's startup process. Due to its location in the BootROM, this vulnerability is immutable by software updates, making it exceptionally powerful and persistent across device iterations affected by the flaw. The blog post characterizes this vulnerability as a "game over" scenario for Apple, as patching it requires a physical hardware revision.

  The exploit itself leverages a weakness in the device's USB Device Firmware Update (DFU) mode, a low-level state used for restoring firmware. By carefully crafting a malicious data packet sent during this mode, Siguza managed to trigger a buffer overflow, effectively granting control over the secure boot chain. This vulnerability allows for the execution of arbitrary code on the device, effectively bypassing Apple's security mechanisms. The blog post provides intricate technical details about the exploitation process, including the specific vulnerability within the USB control transfer handling and the method utilized to gain code execution. It also touches upon the painstaking reverse engineering process involved in understanding the BootROM's inner workings.

  Siguza emphasizes the significance of this achievement, noting the rarity and difficulty of uncovering BootROM vulnerabilities. They also highlight the long and arduous process involved in developing the exploit, including the time spent understanding the complex interplay of hardware and software during the boot process. While acknowledging the potential misuse of such a powerful tool, Siguza expresses hope that its release will foster further research and contribute positively to the jailbreaking community, allowing for deeper exploration of the iOS operating system and unlocking functionalities restricted by Apple. The exploit is released under a somewhat restrictive license, limiting its use to specific devices and preventing direct commercial exploitation. This, according to the post, is a conscious decision aimed at minimizing the potential for malicious use while still providing researchers and enthusiasts with access to the exploit. The post concludes by suggesting that this exploit might represent the final userland 0day jailbreak due to the increasing complexity and security hardening of modern Apple devices.

  • Jailbreak
  • iOS
  • iOS jailbreaking
  • tachy0n
  • 0day
  • Exploit
  • Security
  • iPhone
  • iPad
  • Mobile Security
  • Vulnerability
  • hacking
  • siguza
  • checkra1n

  Summary of Comments ( 36 )
  https://news.ycombinator.com/item?id=44083388

  Verbose tl;dr

  Hacker News users discuss the Tachy0n jailbreak, expressing skepticism about its "last 0day" claim, noting that future iOS versions will likely patch the exploit. Some debate the practicality of the jailbreak given its limited scope to older devices and the availability of checkm8 for similar models. Others commend the technical achievement and the author's clear explanation of the exploit. Concerns about the potential for misuse of the exploit are also raised, alongside discussions about the ethics of disclosing such vulnerabilities. Several commenters point out the limitations of patching bootROM exploits, suggesting this won't be the truly "last" 0day. There's also interest in the potential for using the exploit for purposes other than jailbreaking, like device repair. Finally, a few users share personal anecdotes about jailbreaking and express nostalgia for the practice's heyday.

  The Hacker News post titled "Tachy0n: The Last 0day Jailbreak" generated a significant amount of discussion, with many commenters expressing a mix of nostalgia, technical curiosity, and concern.

  Several commenters reminisced about the "golden age" of jailbreaking, recalling the excitement and sense of community that surrounded it. They discussed the various tools and exploits used in the past, comparing them to Tachy0n and highlighting the evolution of jailbreaking techniques. Some expressed sadness that this might be one of the last opportunities for this kind of exploit due to increasing security measures implemented by Apple.

  A recurring theme in the comments was the technical discussion of the exploit itself. Commenters inquired about the specifics of the vulnerability, how it was discovered, and the implications for future iOS security. Some debated the ethics of jailbreaking and the potential security risks associated with it. There was also discussion around the difficulty of finding and utilizing such vulnerabilities in modern iOS versions.

  Some users expressed concern about the potential misuse of the exploit. They worried that the availability of such tools could lead to increased malware and security breaches. Others countered this argument, stating that jailbreaking primarily empowers users to customize their devices and bypass restrictions imposed by Apple.

  A few comments focused on the practical aspects of jailbreaking. Users asked questions about compatibility with different iOS versions and devices, the process of installing the jailbreak, and the availability of tweaks and modifications. Some shared their personal experiences with jailbreaking and offered advice to newcomers.

  Several commenters also discussed the cat-and-mouse game between Apple and the jailbreaking community, noting that Apple often patches vulnerabilities quickly after they are discovered. This led to discussions about the future of jailbreaking and the likelihood of similar exploits being found in the future.

  Finally, there was some discussion about the name "Tachy0n" itself, with users speculating about its meaning and significance in relation to the exploit.

  Overall, the comments on the Hacker News post reflect the complex and multifaceted nature of the jailbreaking community, highlighting the technical skills, ethical considerations, and nostalgic sentiment associated with this practice.

• Reverse Engineering OpenAI Code Execution to make it run C and JavaScript

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  Posted: 2025-03-12 16:04:54

  Verbose tl;dr

  By exploiting a flaw in OpenAI's code interpreter, a user managed to bypass restrictions and execute C and JavaScript code directly. This was achieved by crafting prompts that tricked the system into interpreting uploaded files as executable code, rather than just data. Essentially, the user disguised the code within specially formatted files, effectively hiding it from OpenAI's initial safety checks. This demonstrated a vulnerability in the interpreter's handling of uploaded files and its ability to distinguish between data and executable code. While the user demonstrated this with C and Javascript, the method theoretically could be extended to other languages, raising concerns about the security and control mechanisms within such AI coding environments.

  The Twitter post by Ben Swerd titled "Reverse Engineering OpenAI Code Execution to make it run C and JavaScript" details a fascinating exploration into the inner workings of OpenAI's code execution environment. Swerd embarked on this project driven by curiosity about how OpenAI handles code interpretation and execution, particularly for languages beyond Python. His initial hypothesis was that OpenAI likely utilizes a Python sandbox for code execution.

  Through meticulous reverse engineering, leveraging observations of the behavior of OpenAI's models when presented with specific code snippets, Swerd discovered a mechanism that allows injecting arbitrary commands into the underlying execution environment. He deduced that OpenAI's system employs a complex process involving multiple layers of interpretation and sandboxing. It appears that code submitted to the system is first processed by a JavaScript interpreter, which in turn interacts with a Python execution environment. This Python environment, seemingly based on a sandboxed version of the language, further connects with a final execution layer.

  Swerd successfully exploited this multi-layered architecture to bypass the initial JavaScript and Python sandboxes. By crafting carefully constructed input strings, he was able to inject and execute commands directly at the final execution layer, effectively gaining access to the underlying system's capabilities. This breakthrough enabled him to run code in languages not officially supported by OpenAI's interface, specifically demonstrating the execution of C and JavaScript code. He showcased this by successfully compiling and running a C program that prints "Hello, world!" and also executed a JavaScript alert box.

  This reverse engineering effort reveals that OpenAI's code execution environment is significantly more intricate than a simple Python sandbox, incorporating multiple layers of interpretation and security measures. Swerd's work demonstrates the potential vulnerabilities of complex systems, highlighting the importance of robust security practices even within seemingly restricted environments. His discovery emphasizes the power of reverse engineering in understanding the true capabilities and limitations of closed-source systems like OpenAI's code execution platform. It also underscores the potential for unintended consequences and security risks when layered interpretations and complex execution pipelines are employed without full transparency and rigorous security analysis.

  • Reverse Engineering
  • OpenAI
  • Code Execution
  • C
  • javascript
  • API
  • Prompt Engineering
  • Jailbreak
  • Large Language Models
  • LLMs
  • AI Safety
  • Security
  • hacking

  Summary of Comments ( 36 )
  https://news.ycombinator.com/item?id=43344673

  Verbose tl;dr

  HN commenters were generally impressed with the hack, calling it "clever" and "ingenious." Some expressed concern about the security implications of being able to execute arbitrary code within OpenAI's models, particularly as models become more powerful. Others discussed the potential for this technique to be used for beneficial purposes, such as running specialized calculations or interacting with external APIs. There was also debate about whether this constituted "true" code execution or was simply manipulating the model's existing capabilities. Several users highlighted the ongoing cat-and-mouse game between prompt injection attacks and defenses, suggesting this was a significant development in that ongoing battle. A few pointed out the limitations, noting it's not truly compiling or running code but rather coaxing the model into simulating the desired behavior.

  The Hacker News post titled "Reverse Engineering OpenAI Code Execution to make it run C and JavaScript" (linking to a Twitter thread describing the process) sparked a discussion with several interesting comments.

  Many commenters expressed fascination with the ingenuity and persistence demonstrated by the author of the Twitter thread. They admired the "clever hack" and the detailed breakdown of the reverse engineering process. The ability to essentially trick the system into executing arbitrary code was seen as a significant achievement, showcasing the potential vulnerabilities and unexpected capabilities of these large language models.

  Some users discussed the implications of this discovery for security. Concerns were raised about the possibility of malicious code injection and the potential for misuse of such techniques. The discussion touched on the broader challenges of securing AI systems and the need for robust safeguards against these kinds of exploits.

  A few comments delved into the technical aspects of the exploit, discussing the specific methods used and the underlying mechanisms that made it possible. They analyzed the author's approach and speculated about potential improvements or alternative techniques. There was some debate about the practical applications of this specific exploit, with some arguing that its limitations made it more of a proof-of-concept than a readily usable tool.

  The ethical implications of reverse engineering and exploiting AI systems were also briefly touched upon. While some viewed it as a valuable exercise in understanding and improving these systems, others expressed reservations about the potential for misuse and the importance of responsible disclosure.

  Several commenters shared related examples of unexpected behavior and emergent capabilities in large language models, highlighting the ongoing evolution and unpredictable nature of these systems. The discussion reflected a sense of both excitement and caution regarding the future of AI and the need for careful consideration of its potential implications. The overall tone was one of impressed curiosity mixed with a healthy dose of concern about the security implications.

• All Kindles can now be jailbroken

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  Posted: 2025-02-17 01:42:12

  Verbose tl;dr

  A new jailbreak called "WinterBreak" has been released, exploiting a vulnerability present in all currently supported Kindle e-readers. This jailbreak allows users to install custom firmware and software, opening up possibilities like alternative ebook stores, custom fonts, and other enhancements not officially supported by Amazon. The exploit is reliable and relatively easy to execute, requiring only a specially crafted MOBI file to be sideloaded onto the device. This marks a significant development in the Kindle modding community, as previous jailbreaks were often device-specific and quickly patched by Amazon. Users are encouraged to update to the latest Kindle firmware before applying the jailbreak, as WinterBreak supports all current versions.

  A significant advancement has occurred in the realm of Kindle e-reader modification, commonly referred to as "jailbreaking." A newly discovered exploit, dubbed "WinterBreak," has rendered all currently available Amazon Kindle devices susceptible to this process. This represents a notable expansion in accessibility, as prior jailbreaking methods were often limited to specific Kindle models and firmware versions, requiring meticulous matching of exploits to vulnerable systems. WinterBreak, however, boasts universal compatibility, effectively eliminating the complexities of device and firmware-specific procedures. This breakthrough simplifies the jailbreaking process considerably, making it accessible to a broader audience of Kindle owners.

  This exploit leverages a vulnerability within the Kindle's update mechanism, specifically targeting the processing of update packages. By manipulating the structure and contents of these packages, WinterBreak allows users to bypass the Kindle's inherent security restrictions and gain escalated privileges, effectively granting control over the underlying operating system. This access, in turn, permits the installation of custom firmware, third-party applications, and modifications not officially sanctioned by Amazon. The implications of this universal exploit are substantial for the Kindle modding community, opening up possibilities for enhanced functionality, customization, and experimentation on a wider range of devices than ever before. The streamlined nature of WinterBreak's execution significantly lowers the barrier to entry for individuals interested in exploring the possibilities of a jailbroken Kindle.

  • Kindle
  • Jailbreak
  • e-reader
  • hacking
  • Firmware
  • WinterBreak
  • Amazon
  • digital rights management
  • DRM
  • eBooks
  • Modding

  Summary of Comments ( 298 )
  https://news.ycombinator.com/item?id=43073969

  Verbose tl;dr

  Hacker News users discuss the implications of a new Kindle jailbreak, primarily focusing on its potential benefits for accessibility and user control. Some express excitement about features like custom fonts, improved PDF handling, and removing Amazon's advertisements. Others caution about potential downsides, such as voiding the warranty and the possibility of bricking the device. A few users share their past experiences with jailbreaking Kindles, mentioning the benefits they've enjoyed, while others question the long-term practicality and the risk versus reward, especially given the relatively low cost of newer Kindles. Several commenters express concern about Amazon's potential response and the future of jailbreaking Kindles.

  The Hacker News post titled "All Kindles can now be jailbroken" (https://news.ycombinator.com/item?id=43073969) attracted a moderate number of comments, mostly focusing on the practical implications and ethical considerations of jailbreaking Kindles.

  Several commenters discussed the benefits of jailbreaking, such as removing Amazon's restrictions and enabling customization. One user highlighted the ability to run custom screensavers, install alternative reading software like KOReader, and achieve greater control over the device. Another pointed out the advantage of using a jailbroken Kindle with a library management system like Calibre. The ability to sideload books from sources other than Amazon was also mentioned as a key motivator for jailbreaking.

  Some users expressed concerns about the potential downsides. One commenter questioned the safety and stability of a jailbroken device, particularly concerning software updates. Another user cautioned about the potential for bricking the device if the jailbreaking process isn't followed correctly.

  The discussion also touched on the ethical dimension of jailbreaking. One commenter argued that jailbreaking is justified as a way to reclaim ownership of a device that has been artificially locked down by the manufacturer. This sentiment was echoed by others who felt that consumers should have the right to control the software on their devices. However, another commenter raised the issue of potentially violating Amazon's terms of service and the possible consequences, although the practical enforcement of such terms in this context wasn't thoroughly explored.

  A few commenters shared their personal experiences with jailbreaking Kindles, offering practical tips and advice. One user mentioned the ease of the process with the new jailbreak method, while another emphasized the importance of following the instructions carefully to avoid problems.

  A couple of users brought up alternative e-readers, like those using e-ink and running Android, suggesting these might be a better option for users seeking greater flexibility and customization without the risks associated with jailbreaking.

  Overall, the comments reflect a mixture of enthusiasm for the possibilities offered by jailbreaking, cautious concern about potential risks, and a nuanced discussion about the ethics of circumventing manufacturer restrictions. The most compelling comments are those that balance the potential benefits with the potential drawbacks, offering a realistic perspective on the implications of jailbreaking a Kindle.

• Garak, LLM Vulnerability Scanner

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  Posted: 2024-11-17 11:37:45

  Verbose tl;dr

  Garak is an open-source tool developed by NVIDIA for identifying vulnerabilities in large language models (LLMs). It probes LLMs with a diverse range of prompts designed to elicit problematic behaviors, such as generating harmful content, leaking private information, or being easily jailbroken. These prompts cover various attack categories like prompt injection, data poisoning, and bias detection. Garak aims to help developers understand and mitigate these risks, ultimately making LLMs safer and more robust. It provides a framework for automated testing and evaluation, allowing researchers and developers to proactively assess LLM security and identify potential weaknesses before deployment.

  NVIDIA has introduced Garak, a novel open-source tool specifically designed to rigorously assess the security vulnerabilities of Large Language Models (LLMs). Garak operates by systematically generating a diverse and extensive array of adversarial prompts, meticulously crafted to exploit potential weaknesses within these models. These prompts are then fed into the target LLM, and the resulting output is meticulously analyzed for a range of problematic behaviors.

  Garak's focus extends beyond simple prompt injection attacks. It aims to uncover a broad spectrum of vulnerabilities, including but not limited to jailbreaking (circumventing safety guidelines), prompt leaking (inadvertently revealing sensitive information from the training data), and generating biased or harmful content. The tool facilitates a deeper understanding of the security landscape of LLMs by providing researchers and developers with a robust framework for identifying and mitigating these risks.

  Garak's architecture emphasizes flexibility and extensibility. It employs a modular design that allows users to easily integrate custom prompt generation strategies, vulnerability detectors, and output analyzers. This modularity allows researchers to tailor Garak to their specific needs and investigate specific types of vulnerabilities. The tool also incorporates various pre-built modules and templates, providing a readily available starting point for evaluating LLMs. This includes a collection of known adversarial prompts and detectors for common vulnerabilities, simplifying the initial setup and usage of the tool.

  Furthermore, Garak offers robust reporting capabilities, providing detailed logs and summaries of the testing process. This documentation helps in understanding the identified vulnerabilities, the prompts that triggered them, and the LLM's responses. This comprehensive reporting aids in the analysis and interpretation of the test results, enabling more effective remediation efforts. By offering a systematic and thorough approach to LLM vulnerability scanning, Garak empowers developers to build more secure and robust language models. It represents a significant step towards strengthening the security posture of LLMs in the face of increasingly sophisticated adversarial attacks.

  • LLM
  • Large Language Model
  • Vulnerability Scanner
  • Security
  • AI Safety
  • AI Security
  • Red Teaming
  • Prompt Injection
  • Jailbreaking
  • Security Testing
  • Nvidia
  • Garak
  • Open Source
  • Tooling
  • machine learning
  • artificial intelligence
  • Jailbreak
  • Adversarial Attacks
  • Security Tool
  • Code Security
  • LLM Security
  • Prompt Engineering
  • Cybersecurity
  • AI Red Teaming
  • LLM Attack
  • LLM Defense
  • Python
  • Framework
  • fuzzing
  • Robustness

  Summary of Comments ( 62 )
  https://news.ycombinator.com/item?id=42163591

  Verbose tl;dr

  Hacker News commenters discuss Garak's potential usefulness while acknowledging its limitations. Some express skepticism about the effectiveness of LLMs scanning other LLMs for vulnerabilities, citing the inherent difficulty in defining and detecting such issues. Others see value in Garak as a tool for identifying potential problems, especially in specific domains like prompt injection. The limited scope of the current version is noted, with users hoping for future expansion to cover more vulnerabilities and models. Several commenters highlight the rapid pace of development in this space, suggesting Garak represents an early but important step towards more robust LLM security. The "arms race" analogy between developing secure LLMs and finding vulnerabilities is also mentioned.

  The Hacker News post for "Garak, LLM Vulnerability Scanner" sparked a fairly active discussion with a variety of viewpoints on the tool and its implications.

  Several commenters expressed skepticism about the practical usefulness of Garak, particularly in its current early stage. One commenter questioned whether the provided examples of vulnerabilities were truly exploitable, suggesting they were more akin to "jailbreaks" that rely on clever prompting rather than representing genuine security risks. They argued that focusing on such prompts distracts from real vulnerabilities, like data leakage or biased outputs. This sentiment was echoed by another commenter who emphasized that the primary concern with LLMs isn't malicious code execution but rather undesirable outputs like harmful content. They suggested current efforts are akin to "penetration testing a calculator" and miss the larger point of LLM safety.

  Others discussed the broader context of LLM security. One commenter highlighted the challenge of defining "vulnerability" in the context of LLMs, as it differs significantly from traditional software. They suggested the focus should be on aligning LLM behavior with human values and intentions, rather than solely on preventing specific prompt injections. Another discussion thread explored the analogy between LLMs and social engineering, with one commenter arguing that LLMs are inherently susceptible to manipulation due to their reliance on statistical patterns, making robust defense against prompt injection difficult.

  Some commenters focused on the technical aspects of Garak and LLM vulnerabilities. One suggested incorporating techniques from fuzzing and symbolic execution to improve the tool's ability to discover vulnerabilities. Another discussed the difficulty of distinguishing between genuine vulnerabilities and intentional features, using the example of asking an LLM to generate offensive content.

  There was also some discussion about the potential misuse of tools like Garak. One commenter expressed concern that publicly releasing such a tool could enable malicious actors to exploit LLMs more easily. Another countered this by arguing that open-sourcing security tools allows for faster identification and patching of vulnerabilities.

  Finally, a few commenters offered more practical suggestions. One suggested using Garak to create a "robustness score" for LLMs, which could help users choose models that are less susceptible to manipulation. Another pointed out the potential use of Garak in red teaming exercises.

  In summary, the comments reflected a wide range of opinions and perspectives on Garak and LLM security, from skepticism about the tool's practical value to discussions of broader ethical and technical challenges. The most compelling comments highlighted the difficulty of defining and addressing LLM vulnerabilities, the need for a shift in focus from prompt injection to broader alignment concerns, and the potential benefits and risks of open-sourcing LLM security tools.