SB2018092126 - Missing WebSocket origin validation in webpack-dev-server

Description

This security bulletin contains information about 1 vulnerability.

1) Missing Origin Validation in WebSockets (CVE-ID: CVE-2018-14732)

CWE-ID: CWE-1385 - Missing Origin Validation in WebSockets

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to missing origin validation on the WebSocket interface in lib/Server.js. A remote attacker can trick the victim into visiting a malicious website that can open a WebSocket connection to localhost and access component source code.

Remediation

Install update from vendor's website.

References

• https://blog.cal1.cn/post/Sniffing%20Codes%20in%20Hot%20Module%20Reloading%20Messages
• https://github.com/webpack/webpack-dev-server/commit/f18e5adf123221a1015be63e1ca2491ca45b8d10
• https://github.com/webpack/webpack-dev-server/issues/1445