chore(deps): update dependency ws to v7.4.6 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ws	7.3.1 -> 7.4.6

GitHub Vulnerability Alerts

CVE-2021-32640

Impact

A specially crafted value of the Sec-Websocket-Protocol header can be used to significantly slow down a ws server.

Proof of concept

for (const length of [1000, 2000, 4000, 8000, 16000, 32000]) {
  const value = 'b' + ' '.repeat(length) + 'x';
  const start = process.hrtime.bigint();

  value.trim().split(/ *, */);

  const end = process.hrtime.bigint();

  console.log('length = %d, time = %f ns', length, end - start);
}

Patches

The vulnerability was fixed in ws@7.4.6 (websockets/ws@00c425e) and backported to ws@6.2.2 (websockets/ws@78c676d) and ws@5.2.3 (websockets/ws@76d47c1).

Workarounds

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.

Credits

The vulnerability was responsibly disclosed along with a fix in private by Robert McLaughlin from University of California, Santa Barbara.

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Release Notes

websockets/ws (ws)

v7.4.6

Compare Source

Bug fixes

• Fixed a ReDoS vulnerability (00c425e).

A specially crafted value of the Sec-Websocket-Protocol header could be used
to significantly slow down a ws server.

for (const length of [1000, 2000, 4000, 8000, 16000, 32000]) {
  const value = 'b' + ' '.repeat(length) + 'x';
  const start = process.hrtime.bigint();

  value.trim().split(/ *, */);

  const end = process.hrtime.bigint();

  console.log('length = %d, time = %f ns', length, end - start);
}

The vulnerability was responsibly disclosed along with a fix in private by
Robert McLaughlin from University of California, Santa Barbara.

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.

v7.4.5

Compare Source

Bug fixes

• UTF-8 validation is now done even if utf-8-validate is not installed
  (23ba6b2).
• Fixed an edge case where websocket.close() and websocket.terminate() did
  not close the connection (67e25ff).

v7.4.4

Compare Source

Bug fixes

• Fixed a bug that could cause the process to crash when using the
  permessage-deflate extension (9277437).

v7.4.3

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Bug fixes

• The deflate/inflate stream is now reset instead of reinitialized when context
  takeover is disabled (#​1840).

v7.4.2

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Bug fixes

• Silenced a deprecation warning (a2c0d44).

v7.4.1

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Bug fixes

• Added a workaround for a double 'error' event bug in Node.js < 13 which
  caused an uncaught error during the WebSocket handshake (38d6ab3).

v7.4.0

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Features

• The callback of WebSocketServer.prototype.handleUpgrade() now takes the
  client HTTP GET request as second argument (7d39f19).

Bug fixes

• Read-only properties are now read-only (eabed8f).
• The CONNECTING, OPEN, CLOSING, CLOSED, binaryType, bufferedAmount,
  extensions, onclose, onerror, onmessage, onopen, protocol,
  readyState, and url properties are now enumerable (2069e68).

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