CVE-2024-5452 Information

Description

A remote code execution (RCE) vulnerability exists in the lightning-ai/pytorch-lightning library version 2.2.1 due to improper handling of deserialized user input and mismanagement of dunder attributes by the deepdiff library. The library uses deepdiff.Delta objects to modify application state based on frontend actions. However it is possible to bypass the intended restrictions on modifying dunder attributes allowing an attacker to construct a serialized delta that passes the deserializer whitelist and contains dunder attributes. When processed this can be exploited to access other modules classes and instances leading to arbitrary attribute write and total RCE on any self-hosted pytorch-lightning application in its default configuration as the delta endpoint is enabled by default.

Reference

https://huntr.com/bounties/486add92-275e-4a7b-92f9-42d84bc759da