CVE-2022-4510: Path Traversal in binwalk

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 22.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-01-25 · updated 2026-06-17
Weakness: CWE-22

Description

A path traversal vulnerability was identified in ReFirm Labs binwalk from version 2.1.2b through 2.3.3 included. By crafting a malicious PFS filesystem file, an attacker can get binwalk's PFS extractor to extract files at arbitrary locations when binwalk is run in extraction mode (-e option). Remote code execution can be achieved by building a PFS filesystem that, upon extraction, would extract a malicious binwalk module into the folder .config/binwalk/plugins. This vulnerability is associated with program files src/binwalk/plugins/unpfs.py. This issue affects binwalk from 2.1.2b through 2.3.3 included.

Affected products

Refirm Labs binwalk: from 2.2.0 before 2.3.3 — fixed in 2.3.3
Refirm Labs binwalk: from 2.1.2b through 2.3.3

How to fix

Upgrade to a fixed version: Refirm Labs binwalk 2.3.3. Check the vendor advisory for mitigations.

References

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