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Paper: Secure file upload in PHP web applications
From: Alla Bezroutchko <alla () scanit be>
Date: Thu, 14 Jun 2007 15:35:54 +0200

Various web applications, such as blogs, forums and photo galleries
allow users to upload files. Providing file upload function without
opening security holes proved to be quite a challenge in PHP web
applications. The applications we have tested suffered from a variety of
security problems, ranging from arbitrary file disclosure to remote
arbitrary code execution.

The paper describes various security holes occurring in file upload
implementations and suggests a way to implement a secure file upload.

The paper can be downloaded from

Alla Bezroutchko

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