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Anti-virus Scan of Programatic Memory Stream

Posted on 2006-07-11
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We are working on a web-based content management solution that allows for uploading files to a database environment.  Files are only written to the hard drive in encrypted fashion, and when decrypted later any virus-laden file can be caught due to temporary writes, but we'd rather trap the file on the way in if it is carrying a virus.  So far the only potential solutions I've been able to find have written files to temporary storage, scanned through the command-line, and checked the error code, but surely there's a better mechanism to allow the scanning of a Windows memory stream.  Any ideas?
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Question by:wtr666
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Phil_Agcaoili earned 500 total points
ID: 17106000
What you have described is a current vulnerability of modern Antivirus solutions.

To deceive virus scanners which filter incoming messages and downloads, more and encrypted archives are delivered to bypass scanning engines. It is impossible for current virus scanners to decide if a virus is contained in an excrypted archive, therefore e-mails or downloaded files with an encrypted or password protected archive attachments are are rendered useless to prevent security risks.

What you are suggesting in the temp space is the best solution I've seen so far to mitigate this issue because even in the memory stream, the files need to be decrypted.
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