TI-2021-03145 Aliases CVE-2021-4287 GHSA-8m3f-g62j-3vx8

ReFirm Labs binwalk Archive Extraction extractor.py symlink

LOW 33CWE-61Published 2022-12-27 · Updated 2025-04-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-61 and the CVSS impact.

Summary

A vulnerability, which was classified as problematic, was found in ReFirm Labs binwalk up to 2.3.2. Affected is an unknown function of the file src/binwalk/modules/extractor.py of the component Archive Extraction Handler. The manipulation leads to symlink following. It is possible to launch the attack remotely. Upgrading to version 2.3.3 is able to address this issue. The name of the patch is fa0c0bd59b8588814756942fe4cb5452e76c1dcd. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216876.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.02145 82nd percentileScored 2026-11-07

Fix Fixed binwalk (PyPI): 2.3.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ReFirm Labs	binwalk	2.3.0; 2.3.1; 2.3.2	—	No fix listed	CNA
—	binwalk (PyPI)	before 2.3.3	2.3.3	Patch available	GHSA-8m3f-g62j-3vx8

binwalk VendorReFirm Labs Affected 2.3.0; 2.3.1; 2.3.2 Fixed in — No fix listed CNA
binwalk (PyPI) Vendor— Affected before 2.3.3 Fixed in 2.3.3 Patch available GHSA-8m3f-g62j-3vx8

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:microsoft:binwalk::::::::	before 2.3.3	Vulnerable	Microsoft

cpe:2.3:a:microsoft:binwalk:*:*:*:*:*:*:*:* Versions before 2.3.3 Vulnerable ·Microsoft

Remediation

Fix · GHSA-8m3f-g62j-3vx8 binwalk (PyPI) Fixed in 2.3.3 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2021-4287
2026-10-03 Alias added: GHSA-8m3f-g62j-3vx8

References

Patch 3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2021-4287

Other 1

https://github.com/ReFirmLabs/binwalk

TI-2022-04123 Path Traversal in binwalk CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences