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brinkster.txt

brinkster.txt
Posted Feb 9, 2004
Authored by Ferruh Mavituna | Site ferruh.mavituna.com

Brinkster, the web hosting company, is susceptible to multiple attacks allowing remote attacker to retrieve other user's ASP source code, access to database files, and bypass of code controls.

tags | advisory, remote, web, asp
SHA-256 | 20321697a1b31690cb24599aed57a01f74205775e8fa4851f50d9b0cbf5200ec

brinkster.txt

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- - ------------------------------------------------------
BRINKSTER MULTIPLE VULNERABILITIES
- - ------------------------------------------------------
Online URL : http://ferruh.mavituna.com/article/?435

1. Retrieving other users ASP Source Codes
Severity: Highly Critical

2. Accessing Database Files
Severity: Medium Critical

3. Skipping Brinkster Code Controls
Severity: Low Critical


- - ------------------------------------------------------
ABOUT BRINKSTER;
- - ------------------------------------------------------
Brinkster is a popular free and paid Windows based web hosting
company with many customers www.brinskter.com

- - ------------------------------------------------------
VULNURABLE;
- - ------------------------------------------------------
Currently (1/26/2004) Brinskter.com is vulnerable;

- - ------------------------------------------------------
1.RETRIEVING OTHER USERS ASP SOURCE CODES
- - ------------------------------------------------------
Any valid user can access other users source codes just by know file
names. So an attacker can access ASP Source Codes, database passwords
and other information in source codes.

- - ------------------------------------------------------
2. ACCESSING DATABASE FILES
- - ------------------------------------------------------
If you know the name of any Brinkster user database file you can
download it. (You can find database name form source code -see:first
vuln.-). Brinkster use a spesific and accesible folder to store user
database files.


- - ------------------------------------------------------
3. SKIPPING CODE CONTROLS
- - ------------------------------------------------------
Brinkster does not allow some code snippets in ASP files for server
performance. Like "Server.Scripttimeout = 8000". Brinkster File
Manager automatically scanning your uploaded source code and if it
finds any restricted keyword, it will delete your uploaded file.

You can skip this by using ASP built-in Execute() function. This
function is not in Brinkster keyword blacklist. So write a simple
decoder and encoder for your code and use it by Execute() function.

- - ------------------------------------------------------
HISTORY;
- - ------------------------------------------------------
01.01.2004 - Discovered
01.18.2004 - Vendor Informed (twice)
02.08.2004 - Published

- - ------------------------------------------------------
Vendor Status;
- - ------------------------------------------------------
No answer;


Ferruh Mavituna
Web Application Security Specialist
http://ferruh.mavituna.com


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