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Judge0 is an open-source online code execution system. The application uses the UNIX chown command on an untrusted file within the sandbox. An attacker can abuse this by creating a symbolic link (symlink) to a file outside the sandbox, allowing the attacker to run chown on arbitrary files outside of the sandbox. This vulnerability is not impactful on it's own, but it can be used to bypass the patch for CVE-2024-28185 and obtain a complete sandbox escape. This vulnerability is fixed in 1.13.1.
Reserved 2024-03-06 | Published 2024-04-18 | Updated 2024-08-02 | Assigner GitHub_MCWE-61: UNIX Symbolic Link (Symlink) Following
CWE-59: Improper Link Resolution Before File Access ('Link Following')
github.com/...judge0/security/advisories/GHSA-3xpw-36v7-2cmg
github.com/...judge0/security/advisories/GHSA-h9g2-45c8-89cf
github.com/...ommit/f3b8547b3b67863e4ea0ded3adcb963add56addd
github.com/...e0/judge0/blob/v1.13.0/app/jobs/isolate_job.rb
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