Improper Input Validation Affecting url-js package, versions <2.1.0
Threat Intelligence
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Start learning- Snyk IDSNYK-JS-URLJS-2414030
- published7 Mar 2022
- disclosed28 Feb 2022
- creditPocas
Introduced: 28 Feb 2022
CVE-2022-25839 (opens in a new tab)How to fix?
Upgrade url-js to version 2.1.0 or higher.
Overview
url-js is a Simple URL parser, similar to DOM URL
Affected versions of this package are vulnerable to Improper Input Validation due to improper parsing, which makes it is possible for the hostname to be spoofed.
http://\\\\\\\\localhost and http://localhost are the same URL. However, the hostname is not parsed as localhost, and the backslash is reflected as it is.
PoC:
Running the following command:
node -e "const URLJS = require('url-js');console.log(URLJS('http://\\\\localhost'))"
Will result in the following output:
URLJS {
protocol: 'http:',
username: '',
password: '',
hostname: '\\localhost',
port: '',
pathname: '/',
search: '',
query: '',
hash: ''
}