Re: [Web Security] File Upload Virus Scanning

["TAS" <p0wnsauc3 () gmail com>]

Hi,

To start with utmost basic practice, the folder in which these files are place should have minimum possible privileges. 
You could also look at removing the excute permissions completely.

An local antivirus action should be set to delete as soon as it detects something suspicious.

The files could be moved for screening to a sandbox like enviorment.

Hope it helps.

TAS
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-----Original Message-----
From: 0x4150 <0x4150 () gmail com>
Sender: listbounce () securityfocus com
Date: Fri, 9 Jul 2010 13:13:13 
To: <security-basics () securityfocus com>; <websecurity () webappsec org>; <webappsec () securityfocus com>
Subject: [Web Security] File Upload Virus Scanning

All,

I am reviewing Java EE web application which allows uploads of various
file types, stores them in a directory, and then offers the same files
to other users for download. The files could be images (jpg, gif,
png), documents (doc, docx, xls, pdf), or text files(txt, csv).

My question is regarding virus scanning of these uploaded files. With
vulnerabilities being reported in formats like PDF, I would like to
protect the users and infrastructure as much as possible.

Are there any best practices for this?

What products (commercial or free) should I evaluate for this process?

Thanks in advance for any insight!

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