fix(deps): update dependency ws to v6 [security] - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ws	^5.2.2 -> ^6.0.0

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 [email protected] (websockets/ws@00c425e) and backported to [email protected] (websockets/ws@78c676d).

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.

References

• GHSA-6fc8-4gx4-v693
• https://nvd.nist.gov/vuln/detail/CVE-2021-32640
• websockets/ws@00c425e
• Backport Security Fix to 6.2.1 websockets/ws#1895

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Release Notes

websockets/ws

v6.2.2

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v6.2.1

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Bug fixes

• Fixed a bug that, under certain circumstances, prevented the close timer from
  being set (aa1dcd5).

v6.2.0

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Features

• Added ability to follow redirects (#​1490).

Bug fixes

• The opening handshake is now aborted if the Sec-WebSocket-Key header field
  value is invalid (160af45).

v6.1.4

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Bug fixes

• Fixed an issue that caused the Host header to always include a port (#​1510).

v6.1.3

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Bug fixes

• Fixed a bug that, under certain circumstances, prevented the close frame from
  being parsed (#​1494).

v6.1.2

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Bug fixes

• Restored compatibility with Node.js < 6.13.0 (26436e0).

v6.1.1

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Bug fixes

• Queued messages to send are now discarded if the permessage-deflate is enabled
  and the socket closes prematurely (#​1464, #​1471).

v6.1.0

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Features

• The WebSocket server now emits a 'close' event when the server
  closes (#​1453).

v6.0.0

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Breaking changes

• Dropped support for Node.js 4 (d73885c).
• Added a shim that throws an error when used if the package is bundled for the
  browser (#​1345).
• Added a maxPayload option on the client. Defaults to 100 MiB (#​1402).
• Dropped support for the memLevel and level options. Use
  zlibDeflateOptions instead. (80e2002).

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