Re: Prevent execution bad commands

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On Sat, 2008-09-27 at 14:45 +0530, Manoj Singh wrote:
> Hi All,
> I am developing a web page where i have to display the files list based on
> some search criteria and of certain duration. My web server is on linux
> operating system. The command i am using for this peropse is:
> 
> find /home/test -mtime -$duration | sort | xargs grep -l "$search_criteria"
> 
> Is any malicious user can use the search criteria to perform some bad
> commands in the operating system.
> 
> If it is then please suggest how to prevent it.
> 
> Please help me out.
> 
> Best Regards,
> Manoj Kumar Singh
It's likely yes, unless you validate the search criteria in any way,
you're just asking for trouble.


Ash
www.ashleysheridan.co.uk


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