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Highly critical

The Uploader File Disclosure and File Upload Vulnerabilities

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Release Date:  2009-12-23    Last Update:  2012-02-24    Views:  2,943

Secunia Advisory SA37873

Where:

From remote

Impact:

Exposure of system information, Exposure of sensitive information, System access

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Two vulnerabilities have been discovered in The Uploader, which can be exploited by malicious people to disclose potentially sensitive information and compromise a vulnerable system.

1) Input passed to the "filename" parameter in api/download_launch.php is not properly verified before being used to read files. This can be exploited to download arbitrary files via directory traversal attacks.

2) The ajax/upload.php script improperly validates the extension of an uploaded file, which can be exploited to upload and execute arbitrary PHP files by uploading a PHP file with e.g. an appended ".jpg" file extension.

Successful exploitation of this vulnerability requires that Apache is not configured to handle the mime-type for media files with e.g. a ".jpg" extension.

The vulnerabilities are confirmed in version 2.0.5. Other versions may also be affected.


Solution:
Edit the source code to ensure that input is properly verified. Restrict access to the upload folder (e.g. via .htaccess).

Provided and/or discovered by:
1) Stack.
2) Danny Moules.

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: The Uploader File Disclosure and File Upload Vulnerabilities

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