| Titre | Before-Authentication XSS in Netgear-SRX5308 Router(1) |
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| Description | # Before-Authentication XSS in Netgear-SRX5308 Router
## Overview
* Type: XSS
* Supplier: Netgear (https://www.netgear.com/)
* URL: https://192.168.1.1
* Product: SRX5308 – ProSAFE Quad WAN Gigabit SSL VPN Firewall
* Affect version: (lastest) 4.3.5-3
* Firmware download: https://www.downloads.netgear.com/files/GDC/SRX5308/SRX5308_V4.3.5-3.zip
## Description
The XSS vulnerability is at the web management interface of the affected routers. The vulnerability results from improper validation of user-supplied input in the web-based management interface. An unauthenticated attacker could exploit the vulnerability by sending the crafted HTTP request to affected devices.
The injection happens at the "Login.userAgent" parameter which isn't sanitized.
## Business Impact
This before-authentication XSS vulnerability is severe and could result in serious damage. Thus the vulnerability is very dangerous which could also result in reputational damage for the business through the impact on customers' trust.
## Steps to Reproduce
1. Configure the web IP address in POC: xss_post_poc-Before-Authen.html(the Default IP address is: 192.168.1.1).
2. Open xss_post_poc-Before-Authen.html with the browser. You will see an alert window pop up.
## Proof of Concept
Advisory URL.
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| La source | ⚠️ https://github.com/leetsun/IoT/tree/main/Netgear-SRX5308/15 |
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| Utilisateur | leetsun (UID 39457) |
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| Soumission | 13/04/2023 15:42 (il y a 3 ans) |
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| Modérer | 28/04/2023 13:50 (15 days later) |
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| Statut | Accepté |
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| Entrée VulDB | 227673 [Netgear SRX5308 jusqu’à 4.3.5-3 Web Management Interface Login.userAgent cross site scripting] |
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| Points | 20 |
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