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GreenBeast CMS File Upload And Logon Bypass
Secunia Advisory: SA22769
Release Date: 2006-11-09
Last Update: 2006-11-16
Popularity: 5,967 views

Critical:
Highly critical
Impact: Security Bypass
System access
Where: From remote
Solution Status: Unpatched

Software:GreenBeast CMS 1.x

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CVE reference:CVE-2006-5833


Description:
skulmatic has reported two vulnerabilities in GreenBeast CMS, which potentially can be exploited by malicious people to compromise a vulnerable system.

The vulnerabilities are caused due to gbcms_php_files/up_loader.php both failing to verify that the user is logged on and failing to validate the extension of an uploaded file. This can be exploited to upload files with arbitrary extensions (e.g. ".php") and execute arbitrary PHP code on the server without requiring a valid logon.

The vulnerabilities are reported in version 1.3. Other versions may also be affected.

Solution:
Restrict access to gbcms_php_files/up_loader.php and ensure that input is properly validated.

Provided and/or discovered by:
skulmatic

Changelog:
2006-11-16: Added CVE reference.

Original Advisory:
http://newhack.org/advisories/GreenBeastCMS.txt


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