UNIX Hard Link in fstream package for NPM

Published: 2019-05-24

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	N/A
CWE-ID	CWE-62
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	fstream Web applications / JS libraries
Vendor	Node.js Foundation

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) UNIX Hard Link

EUVDB-ID: #VU18601

Risk: Medium

CVSSv3.1: 5.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-62 - UNIX Hard Link

Exploit availability: No

Description

The vulnerability allows a remote attacker to arbitrary file overwrite.

The vulnerability exists due to a file that matches the hardlink overwrites the system's file with the contents of the extracted file. A remote attacker can cause the software to operate on unauthorized files.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

fstream: 0.0.1 - v1.0.11

External links

http://snyk.io/vuln/SNYK-JS-FSTREAM-174725

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.