Improper Link Resolution and Path Traversal in tar-fs by Mafintosh
CVE-2024-12905

7.5HIGH

Key Information:

Status
Vendor
CVE Published:
27 March 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

The tar-fs package contains vulnerabilities that allow for improper link resolution before file access and improper limitations on pathnames during file extraction. By exploiting these flaws, an attacker can craft a malicious tar file, leading to unauthorized file writes or overwrites outside the intended extraction directory. This security issue specifically affects versions of the tar-fs package prior to 1.16.4, 2.1.2, and 3.0.8. Immediate updates to the latest versions are recommended to mitigate potential risks.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2024-12905-PoC
Created by theMcSam

References

https://github.com/mafintosh/tar-fs/commit/a1dd7e7c7f4b4a...
patch
https://www.seal.security/blog/a-link-to-the-past-uncover...
technical-description

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

@bnbdr
.