Judge0 up to 1.13.0 run_script symlink

Summaryinfo

A vulnerability was found in Judge0 up to 1.13.0. It has been classified as critical. This affects the function run_script. This manipulation causes symlink. This vulnerability is handled as CVE-2024-28185. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in Judge0 up to 1.13.0. It has been declared as very critical. Affected by this vulnerability is the function run_script. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Judge0 is an open-source online code execution system. The application does not account for symlinks placed inside the sandbox directory, which can be leveraged by an attacker to write to arbitrary files and gain code execution outside of the sandbox. When executing a submission, Judge0 writes a `run_script` to the sandbox directory. The security issue is that an attacker can create a symbolic link (symlink) at the path `run_script` before this code is executed, resulting in the `f.write` writing to an arbitrary file on the unsandboxed system. An attacker can leverage this vulnerability to overwrite scripts on the system and gain code execution outside of the sandbox.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2024-28185 since 03/06/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/21/2024).

It is possible to download the exploit at packetstormsecurity.com. It is declared as highly functional.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• Judge0

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13.0

License

• open-source

Website

• Product: https://github.com/judge0/judge0/

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