#VU28537 Improper Authorization in Node.js - CVE-2020-8172

Vulnerability identifier: #VU28537

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-8172

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js
Server applications / Web servers

Vendor: Node.js Foundation

Description

The vulnerability allows a remote attacker to bypass authorization process.

The vulnerability exists due to TLS session reuse and host certificate verification bypass, as the 'session' event can be emitted before the 'secureConnect' event in Node.js. The application agent performs https session caching and an unauthorized connection can be established via the cached session ticket and treated as authorized connection.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Node.js: 12.0.0, 12.1.0 - 12.17.0, 12.2.0, 12.3.0 - 12.3.1, 12.4.0, 12.5.0, 12.6.0, 12.7.0, 12.8.0 - 12.8.1, 12.9.0 - 12.9.1, 13.0.0 - 13.0.1, 13.1.0 - 13.14.0, 13.2.0, 13.3.0, 13.4.0, 13.5.0, 13.6.0, 13.7.0, 13.8.0, 13.9.0, 14.0.0, 14.1.0, 14.2.0, 14.3.0

---

External links
http://nodejs.org/en/blog/vulnerability/june-2020-security-releases/

---

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.