#VU50833 Permissions, Privileges, and Access Controls in socket.io - CVE-2020-28481

Vulnerability identifier: #VU50833

Vulnerability risk: Medium

CVSSv4.0: 5.5 [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:P/U:Green]

CVE-ID: CVE-2020-28481

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
socket.io
Universal components / Libraries / Libraries used by multiple products

Vendor: socket.io

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to CORS misconfiguration. A remote attacker can gain access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

socket.io: 0.5.0 - 2.3.0

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External links
https://github.com/socketio/socket.io/issues/3671
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1056358
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1056357
https://snyk.io/vuln/SNYK-JS-SOCKETIO-1024859

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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. However, proof of concept for this vulnerability is available.