Improper Input Validation Affecting url-js package, versions <2.1.0
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
0.07% (30th
percentile)
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Test your applications- Snyk ID SNYK-JS-URLJS-2414030
- published 7 Mar 2022
- disclosed 28 Feb 2022
- credit Pocas
Introduced: 28 Feb 2022
CVE-2022-25839 Open this link in a new tabHow 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: ''
}
References
CVSS Scores
version 3.1