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Vigil@nce - Node.js ws: denial of service via websocket

August 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can send a message the size of which is greater than
256Mb via a websocket managed by Node.js ws, in order to kill the
server process.

Impacted products: Fedora, Node.js Modules not comprehensive.

Severity: 2/4.

Creation date: 27/06/2016.

DESCRIPTION OF THE VULNERABILITY

The ws module can be installed on Node.js.

This module is an implementation of the protocol WebSockets over
HTTP. However, This module can not handle messages the size of
which is greater then 256Mb.

An attacker can therefore send a message the size of which is
greater than 256Mb via a websocket managed by Node.js ws, in order
to kill the server process.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Node-js-ws-denial-of-service-via-websocket-19976


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