[Security] Bump socket.io from 2.1.1 to 2.4.1

[dependabot-preview]

Bumps socket.io from 2.1.1 to 2.4.1. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Insecure defaults due to CORS misconfiguration in socket.io The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.

Affected versions: < 2.4.0

Release notes

Sourced from socket.io's releases.

2.4.1

This release reverts the breaking change introduced in 2.4.0 (socketio/socket.io@f78a575).

If you are using Socket.IO v2, you should explicitly allow/disallow cross-origin requests:

• without CORS (server and client are served from the same domain):

io.origins((req, callback) => {
  callback(null, req.headers.origin === undefined); // cross-origin requests will not be allowed
});

• with CORS (server and client are served from distinct domains):

io.origins(["http://localhost:3000"]); // for local development
io.origins(["https://example.com"]);

In any case, please consider upgrading to Socket.IO v3, where this security issue is now fixed (CORS is disabled by default).

Reverts

• fix(security): do not allow all origins by default (a169050)

Links:

• Diff: socketio/socket.io@2.4.0...2.4.1
• Client release: -
• engine.io version: ~3.5.0
• ws version: ~7.4.2

2.4.0

Related blog post: https://socket.io/blog/socket-io-2-4-0/

Features (from Engine.IO)

• add support for all cookie options (19cc582)
• disable perMessageDeflate by default (5ad2736)

Bug Fixes

• security: do not allow all origins by default (f78a575)
• properly overwrite the query sent in the handshake (d33a619)

⚠️ BREAKING CHANGE ⚠️

Previously, CORS was enabled by default, which meant that a Socket.IO server sent the necessary CORS headers (Access-Control-Allow-xxx) to any domain. This will not be the case anymore, and you now have to explicitly enable it.

... (truncated)

Changelog

Sourced from socket.io's changelog.

2.4.1 (2021-01-07)

Reverts

• fix(security): do not allow all origins by default (a169050)

2.4.0 (2021-01-04)

Bug Fixes

• security: do not allow all origins by default (f78a575)
• properly overwrite the query sent in the handshake (d33a619)

Commits

• e6b8697 chore(release): 2.4.1
• a169050 revert: fix(security): do not allow all origins by default
• 873fdc5 chore(release): 2.4.0
• f78a575 fix(security): do not allow all origins by default
• d33a619 fix: properly overwrite the query sent in the handshake
• 3951a79 chore: bump engine.io version
• 6fa026f ci: migrate to GitHub Actions
• 47161a6 [chore] Release 2.3.0
• cf39362 [chore] Bump socket.io-parser to version 3.4.0
• 4d01b2c test: remove deprecated Buffer usage (#3481)
• Additional commits viewable in compare view

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