Pensar - auto fix for Unsafe Pickle Deserialization Enabling Remote Code Execution

[pensarapp]

The security fix applied addresses the unsafe use of Python's pickle deserialization in the DataPoint class:

Vulnerability Fixed:

• The from_pickle method previously allowed direct deserialization of untrusted input with pickle.loads. This is highly dangerous as malicious payloads could execute arbitrary code (CWE-502: Deserialization of Untrusted Data).

Fix:

• The entire from_pickle method (lines 83-87) has been removed as per the official recommendation in the provided patch and vulnerability analysis.
• This eliminates the code path that allowed deserializing arbitrary pickled data.
• A comment is added in place of the method to clearly document that it was removed specifically due to this security risk.

Impact:

• Code attempting to use DataPoint.from_pickle will no longer find the method, which is necessary to prevent exploitation.
• Serialization with .to_pickle() is unchanged and still allows exporting to pickle byte format. Safe deserialization pathways (from JSON or dict) remain unaffected.

More Details

Type	Identifier	Message	Severity	Link
Application	CWE-502	The method from_pickle directly calls pickle.loads on the supplied pickled_data. Python’s pickle format is inherently unsafe: deserializing data from an untrusted or unauthenticated source can execute arbitrary code embedded in the pickle payload. If an attacker can influence or supply pickled_data, they can achieve remote code execution within the application process.	critical	Link

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