# literally the dumbest thing I've ever read Source: https://www.youtube.com/watch?v=-uxF4KNdTjQ Recap page: https://rapidrecap.app/video/-uxF4KNdTjQ Generated: 2025-09-16T15:03:06.952+00:00 --- ## Quick Overview Daniel Stenberg, the lead developer of curl, shares a report detailing a "Stack Buffer Overflow in cURL Cookie Parsing Leads to RCE" vulnerability, highlighting the potential for remote code execution and memory corruption, and criticizes the use of AI in generating such reports, deeming them "literally the dumbest thing I've ever read." **Key Points:** - A critical stack buffer overflow vulnerability in cURL's cookie parsing mechanism can lead to remote code execution. - The vulnerability occurs when processing malicious HTTP cookies, affecting all applications using libcurl. - The vulnerability is rated as 9.8 (CRITICAL) with a CVSS 3.1 score. - Daniel Stenberg, lead developer of cURL, views the AI-generated report as "literally the dumbest thing I've ever read." - The report details methods to reproduce the vulnerability, including HTTP Response Attack and Cookie File Injection. - Immediate mitigation involves safe cookie processing with bounds checking and using safer string functions. - Stenberg emphasizes the need to reduce "sand in the machine" by discouraging low-quality reports, whether AI-generated or not. ![Screenshot at 00:37: The HackerOne report detailing the "Stack Buffer Overflow in cURL Cookie Parsing Leads to RCE" vulnerability, which is the central topic of discussion.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-00-37.png) **Context:** Daniel Stenberg, the lead developer of the widely-used command-line tool cURL, is featured in this video discussing a significant security vulnerability found within his project. The vulnerability, identified as a "Stack Buffer Overflow in cURL Cookie Parsing Leads to RCE," was reported via HackerOne. Stenberg expresses his strong negative opinion about the quality and origin of the report, particularly criticizing the involvement of AI in its creation. ## Detailed Analysis Daniel Stenberg, the lead developer of cURL, discusses a critical security vulnerability found in cURL's cookie parsing mechanism, which allows for remote code execution and memory corruption. The vulnerability, reported on HackerOne and rated with a CVSS score of 9.8 (CRITICAL), is triggered by maliciously crafted HTTP cookies. Stenberg expresses extreme dissatisfaction with the report, calling it "literally the dumbest thing I've ever read," and criticizes the perceived reliance on AI for generating such findings, arguing that AI often produces low-quality or nonsensical reports. He outlines the technical details of the vulnerability, including the root cause analysis related to buffer size mismatch and unsafe string operations. The report also provides steps to reproduce the vulnerability and lists affected systems, ranging from web applications to IoT devices. Stenberg concludes by emphasizing the importance of quality in security reports and the need to "reduce the amount of sand in the machine" by discouraging low-quality submissions, regardless of whether AI was involved. ### Vulnerability Details - Stack Buffer Overflow in cURL Cookie Parsing Leads to RCE - Remote Code Execution, Memory Corruption, Information Disclosure, Denial of Service - CVSS Score: 9.8 (CRITICAL) ### Stenberg's Critique of AI Reports - Calls AI-generated reports "literally the dumbest thing I've ever read" - Criticizes low-quality reports and the "emotional toll" of dealing with them ### Technical Analysis - Vulnerability occurs in cookie parsing when string length calculations exceed buffer boundaries - Root causes include Buffer Size Mismatch, Unsafe String Operations, Stack Memory Corruption ### Reproducing the Vulnerability - Provides methods like HTTP Response Attack and Cookie File Injection - Details specific code and commands for testing ### Affected Systems - Web Applications, Web Browsers, API Services, Mobile Applications, Server Software, IoT Devices ### Recommended Fixes - Implement strict cookie size limits, Memory Safety for large cookie buffers, Bounds Checking, Fuzzing Integration ### Stenberg's Call to Action - Encourages quality in security reports and reducing "sand in the machine" ![Screenshot at 00:37: The HackerOne report detailing the "Stack Buffer Overflow in cURL Cookie Parsing Leads to RCE" vulnerability, which is the central topic of discussion.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-00-37.png) ![Screenshot at 01:41: The Proof of Concept code provided in the HackerOne report, showing the specific C code used to trigger the vulnerability.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-01-41.png) ![Screenshot at 03:23: The official documentation for AddressSanitizer \(ASan\), a memory error detector used in the vulnerability analysis.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-03-23.png) ![Screenshot at 04:16: The "Steps to Reproduce" section of the report, outlining the environment setup and compilation commands.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-04-16.png) ![Screenshot at 05:54: The "Result" section of the report, confirming a "GUARANTEED CRASH" with "100% reliable reproduction of the vulnerability."](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-05-54.png) ![Screenshot at 07:15: The "Verification Status" confirming the vulnerability was successfully reproduced and verified with AddressSanitizer.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-07-15.png) ![Screenshot at 07:28: The "CVSS 3.1 Assessment" showing a Base Score of 9.8 \(CRITICAL\), indicating the severity of the vulnerability.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-07-28.png) ![Screenshot at 08:05: A comment from "batuilnilgar" retracting the vulnerability claim and apologizing, stating the "attached PoC does not exercise libcurl and therefore does not demonstrate a cURL bug."](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-08-05.png) ![Screenshot at 08:38: Daniel Stenberg's blog post titled "AI SLOP ATTACKS ON THE CURL PROJECT," where he discusses similar issues and his frustration with low-quality reports.](https://ss.rapidrecap.app/screens/-uxF4KNdTjQ/00-08-38.png)