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Improper Control of Dynamically-Managed Code Resources

CVE-2024-5452

High
9.8/10

Summary

A remote code execution (RCE) vulnerability exists in the lightning-ai/pytorch-lightning library 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 the 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. This issue affects lightning versions through 2.3.2, 2.4.0.dev20240630, and 2.4.0.dev20240707.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-913 - Improper Control of Dynamically-Managed Code Resources

The software does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.

References

Advisory Timeline

  • Published