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Server-side Request Forgery (SSRF) Affecting ip package, versions <1.1.9 >=2.0.0 <2.0.1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.08% (35th percentile)
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NVD
9.8 critical
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Red Hat
9.8 critical

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  • Snyk ID SNYK-JS-IP-6240864
  • published 11 Feb 2024
  • disclosed 8 Feb 2024
  • credit Emre Durmaz
Report a new vulnerability Found a mistake?

Introduced: 8 Feb 2024

CVE-2023-42282 Open this link in a new tab
CWE-918 Open this link in a new tab

How to fix?

Upgrade ip to version 1.1.9, 2.0.1 or higher.

Overview

ip is a Node library.

Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the isPublic function, by failing to identify hex-encoded 0x7f.1 as equivalent to the private addess 127.0.0.1. An attacker can expose sensitive information, interact with internal services, or exploit other vulnerabilities within the network by exploiting this vulnerability.

PoC 

var ip = require('ip');

console.log(ip.isPublic("0x7f.1"));
//This returns true. It should be false because 0x7f.1 == 127.0.0.1 == 0177.1