Skip to content

XSS at Account creation

Moderate
Bubka published GHSA-cwhq-2mcq-pp9q Jul 3, 2023

Package

docker 2FAuth (Docker)

Affected versions

<= v4.0.2

Patched versions

v4.0.3

Description

Summary

on /account/create an XSS injection can be done via the account/service field. (tested in docker-compose environment)

PoC

  • Navigate to /account/create and enter in the upper text field one of the following strings (more can be possible, I only tested those 2)
<image/src/onerror=prompt(8)> 
<!--<img src="--><img src=x onerror=javascript:alert(1)//">
  • click the next left button "Ich habe Glück" (sorry tested in German)
  • an alert is being executed
  • the first string can as well be saved as project name but luckily is not being executed on other pages

image
image
image

Impact

XSS is known as TOP 10 OWASP finding. I guess you already heared about it. If not, please have a look here: https://owasp.org/www-community/attacks/xss/.

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

CVE ID

CVE-2023-36816

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

Credits