CVEs-PoC/2021/CVE-2021-32640.md

CVE-2021-32640

Description

ws is an open source WebSocket client and server library for Node.js. A specially crafted value of the Sec-Websocket-Protocol header can be used to significantly slow down a ws server. The vulnerability has been fixed in ws@7.4.6 (https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff). In vulnerable versions of ws, the issue can be mitigated by reducing the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options.

POC

Reference

• https://github.com/websockets/ws/commit/00c425ec77993773d823f018f64a5c44e17023ff
• https://github.com/websockets/ws/security/advisories/GHSA-6fc8-4gx4-v693

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/PalindromeLabs/awesome-websocket-security
• https://github.com/anthonykirby/lora-packet
• https://github.com/engn33r/awesome-redos-security
• https://github.com/luiz-meireles/Redes-EP4