high8.1

CVE-2025-71378

Picklescan is missing detection when calling built-in Python cProfile.runctx

Impact

### Summary Using cProfile.runctx function, 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 cProfile.runctx 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 ``` import cProfile class EvilCProfileRunctx: def __reduce__(self): # cProfile.runctx(cmd, globals, locals) -> exec(cmd, ...) return cProfile.runctx, ("__import__('os').system('whoami')", None, None) ``` ### 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

Affected packages

Ecosystem	Package	Affected	Fixed in
pip	`picklescan`	< 0.0.30	0.0.30

Affected products

Vendor	Product	Affected versions
Mmaitre314	Picklescan	before 0.0.30

Weakness classification

CWE-502

Impact

Affected packages

Affected products

Weakness classification

References