#VU16170 Spoofing attack in Node.js - CVE-2018-12123

Vulnerability identifier: #VU16170

Vulnerability risk: Low

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

CVE-ID: CVE-2018-12123

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js
Server applications / Web servers

Vendor: Node.js Foundation

Description
The disclosed vulnerability allows a remote attacker to conduct spoofing attack on the target system.

The vulnerability exists due to security decisions are made about the URL based on the hostname. A remote attacker can use a mixed case "javascript:" (e.g. "javAscript:") protocol and spoof the hostname when a Node.js application is using url.parse()to determine the URL hostname.

Mitigation
The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0, 6.1.0 - 6.14.4, 6.2.0 - 6.2.2, 6.3.0 - 6.3.1, 6.4.0, 6.5.0, 6.6.0, 6.7.0, 6.8.0 - 6.8.1, 6.9.0 - 6.9.5, 8.0.0, 8.1.0 - 8.13.0, 8.2.0 - 8.2.1, 8.3.0, 8.4.0, 8.5.0, 8.6.0, 8.7.0, 8.8.0 - 8.8.1, 8.9.0 - 8.9.4, 10.0.0, 10.1.0 - 10.13.0, 10.2.0 - 10.2.1, 10.3.0, 10.4.0 - 10.4.1, 10.6.0, 10.7.0, 10.8.0, 10.9, 11.0.0, 11.1.0, 11.2.0

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External links
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

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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.