Reddit: Regular Expression Denial of Service vulnerability

Summary: The vulnerability I have found is classified as a Regular Expression Denial of Service. While inspecting the source code file RealtimeGQLSubscriptionAsync.js I came across the nodemodule subscriptions-transport-ws See Screenshot 1. The search result of the subscriptions-transport-ws...

Regular Expression Denial of Service

Overview In ws before versions 5.2.3, 6.2.2 and 7.4.6 there is a ReDOS vulnerability. Impact A specially crafted value of the Sec-Websocket-Protocol header can be used to significantly slow down a ws server. Proof of concept js for const length of 1000, 2000, 4000, 8000, 16000, 32000 const value ...

CVE-2021-32640

CVE-2021-32640 affects the Node.js ws library. A specially crafted value in the Sec-Websocket-Protocol header can be used to significantly slow down a ws server (resource consumption). The issue is fixed in [email protected]. In vulnerable versions, mitigation includes reducing the maximum length of HTTP ...