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githubGitHub Advisory DatabaseGHSA-3VJF-82FF-P4R3
HistoryApr 06, 2022 - 12:01 a.m.

Incorrect protocol extraction via \r, \n and \t characters

2022-04-0600:01:31
CWE-20
GitHub Advisory Database
github.com
10

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

0.001 Low

EPSS

Percentile

29.7%

\r, \n and \t characters in user-input URLs can potentially lead to incorrect protocol extraction when using npm package urijs prior to version 1.19.11.

This can lead to XSS when the module is used to prevent passing in malicious javascript: links into HTML or Javascript (see following example):

const parse = require('urijs')
const express = require('express')
const app = express()
const port = 3000

input = "ja\r\nvascript:alert(1)"
url = parse(input)

console.log(url)

app.get('/', (req, res) => {
 if (url.protocol !== "javascript:") {res.send("<iframe src=\'" + input + "\'>CLICK ME!</iframe>")}
})

app.listen(port, () => {
 console.log(`Example app listening on port ${port}`)
})

Affected configurations

Vulners
Node
urijsRange<1.19.11
CPENameOperatorVersion
urijslt1.19.11

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

0.001 Low

EPSS

Percentile

29.7%

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