Path traversal in ELECOM File Manager App

1) Path traversal

EUVDB-ID: #VU49995

Risk: Medium

CVSSv3.1: 4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-20651

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and create an arbitrary file or overwrite an existing file.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

ELECOM File Manager: All versions

External links

http://jvn.jp/en/jp/JVN98115035/index.html
http://www.elecom.co.jp/news/security/20210126-01/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

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