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Improper Input Validation Affecting org.webjars.npm:socket.io-parser package, versions [,4.0.5) [4.1.0,4.2.1)

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.21% (59th percentile)
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NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-ORGWEBJARSNPM-3091013
  • published 30 Oct 2022
  • disclosed 26 Oct 2022
  • credit Thomas Rinsma
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Introduced: 26 Oct 2022

CVE-2022-2421 Open this link in a new tab
CWE-89 Open this link in a new tab

How to fix?

Upgrade org.webjars.npm:socket.io-parser to version 4.0.5, 4.2.1 or higher.

Overview

org.webjars.npm:socket.io-parser is a socket.io protocol parser

Affected versions of this package are vulnerable to Improper Input Validation when parsing attachments containing untrusted user input. Attackers can overwrite the _placeholder object to place references to functions in query objects.

PoC 

const decoder = new Decoder();

decoder.on("decoded", (packet) => {
  console.log(packet.data); // prints [ 'hello', [Function: splice] ]
})

decoder.add('51-["hello",{"_placeholder":true,"num":"splice"}]');
decoder.add(Buffer.from("world"));