Dissecting and Exploiting CVE-2025-62507: Remote Code Execution in Redis

CVE-2025-62507, a high-severity stack buffer overflow vulnerability in Redis version 8.2, was fixed in version 8.3.2 and can potentially lead to remote code execution (RCE) by exploiting the XACKDEL command, which processes multiple message IDs and was introduced to streamline stream cleanup. The vulnerability arises from the xackdelCommand function, which does not properly verify the number of IDs provided, allowing for stack-based buffer overflow and manipulation of the function's return address. The JFrog Security Research team demonstrated successful exploitation, despite mitigation techniques like ASLR and NX, through a Return-Oriented Programming (ROP) chain and ret2libc methods, showing that even mature projects can harbor such vulnerabilities when complex features are added. Although the issue is not deemed critical, the lack of stack canary protections in certain Redis compilations makes it easier to exploit, emphasizing the need for robust security measures during software compilation and the importance of not solely relying on CVSS scores for patch prioritization.