CVE-2025-67747

Description

Fickling is a Python pickling decompiler and static analyzer. Versions prior to 0.1.6 are missing `marshal` and `types` from the block list of unsafe module imports. Fickling started blocking both modules to address this issue. This allows an attacker to craft a malicious pickle file that can bypass fickling since it misses detections for `types.FunctionType` and `marshal.loads`. A user who deserializes such a file, believing it to be safe, would inadvertently execute arbitrary code on their system. This impacts any user or system that uses Fickling to vet pickle files for security issues. The issue was fixed in version 0.1.6.

References

https://github.com/trailofbits/fickling/security/advisories/GHSA-565g-hwwr-4pp3

https://github.com/trailofbits/fickling/releases/tag/v0.1.6

https://github.com/trailofbits/fickling/pull/186

https://github.com/trailofbits/fickling/commit/4e34561301bda1450268d1d7b0b2b151de33b913

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS