#VU58203 Path traversal in tar

Published: 2021-11-17

Vulnerability identifier: #VU58203

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-37712


Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Web applications / JS libraries

Vendor: npm Inc.


The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when extracting tar files that contained two directories and a symlink with names containing unicode values that normalized to the same value. A remote attacker can create a specially crafted archive that, when extracted, can overwrite arbitrary files on the system.

Install update from vendor's website.

Vulnerable software versions

tar: 4.0.0 - 6.1.8

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability