VDB
KO
MEDIUM

GHSA-x696-vm39-cp64

Picklescan has a missing detection when calling built-in python profile.Profile.run

Details

### Summary

Using profile.Profile.run, which is a built-in python library function to execute remote pickle file.

### Details

The attack payload executes in the following steps:

First, the attacker craft the payload by calling to profile.Profile.run function in reduce method Then when the victim after checking whether the pickle file is safe by using Picklescan library and this library doesn't dectect any dangerous functions, decide to pickle.load() this malicious pickle file, thus lead to remote code execution.

### PoC

``` class EvilProfileRun: def __reduce__(self): from profile import Profile payload = "__import__('os').system('whoami')" return Profile.run, (Profile(), payload) ```

### Impact

Who is impacted? Any organization or individual relying on picklescan to detect malicious pickle files inside PyTorch models. What is the impact? Attackers can embed malicious code in pickle file that remains undetected but executes when the pickle file is loaded. Supply Chain Attack: Attackers can distribute infected pickle files across ML models, APIs, or saved Python objects.

### Corresponding

https://github.com/FredericDT https://github.com/Qhaoduoyu

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / picklescan
Introduced in: 0 Fixed in: 0.0.29
Fix pip install --upgrade 'picklescan>=0.0.29'

References