Submit #258615: Github ShifuML 0.12.0 Expression Language Injection

Description:
The Shifu project of ShifuML https://github.com/ShifuML/shifu is vulnerable to Java Expression Language Injection Via FilterExpression parameter.

Impact:
The quick impact here is Code Execution, but depending upon how the project is being used it can either lead to Initial Access Via Remote Code Execution or Local Privilege Escalation VIA Rce if the Shifu binary is being given sudo permission.

Steps To Reproduce:
Check out the Proof-Of-Concept Video.

RootCause:
https://github.com/ShifuML/shifu/blob/20f589158adfc011c505664cf7bdf31e36ed62fa/src/main/java/ml/shifu/shifu/core/DataPurifier.java#L53

There are multiple occurrences of JEXL.CreateExpression and evaluation.
All them can lead to Code Execution.

Mitigation:
JEXL Expression should be evaluated in a sandboxed Environment.
https://blog.gypsyengineer.com/en/security/detecting-jexl-injections-with-codeql.html

• Source: ⚠️ https://drive.google.com/file/d/1ST3dD-iwUBgBNZ8tGaBbqVi1zRh5rLND/view?usp=sharing
• User: w3bspl01t3r (UID 39229)
• Submission: 12/26/2023 21:50 (2 years ago)
• Moderation: 12/28/2023 09:48 (1 day later)
• Status: Accepted
• VulDB entry: 249151 [ShifuML shifu 0.12.0 Java Expression Language DataPurifier.java FilterExpression code injection]
• Points: 20