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www.waraxe.us Forum Index -> Cross-site scripting aka XSS -> What if the <> tags are filtered?
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What if the <> tags are filtered?
PostPosted: Sun Feb 10, 2008 5:21 pm Reply with quote
Panic_Mode
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Joined: Feb 09, 2008
Posts: 39




Exept for <> tags what other way can be used to test if a site is vulnerable...?

I found XSS vulnerability by injecting javascript through the sites search engine but the admin found it and fixed that. Now I use >" <script> tags etc and the engine ignores them and just continues searching...

Is there another place in the site that I can test if it is capable of XSS ?
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PostPosted: Sun Feb 10, 2008 5:34 pm Reply with quote
pexli
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Posts: 665
Location: Bulgaria




< = %3C
> = %3E

< = chr(60)
> = chr(62)
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PostPosted: Sun Feb 10, 2008 5:40 pm Reply with quote
Panic_Mode
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yeh indeed Razz

chance of being filtered too?
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PostPosted: Wed Mar 12, 2008 2:07 am Reply with quote
Oilik
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Posts: 35




koko wrote:
< = %3C
> = %3E

I thought your browser automatically made those when putting < and > in the URL bar and clicking enter[also applies to PostData], and that file on the server automatically makes that < and >, so it would make no difference.

Correct me if I'm wrong..
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PostPosted: Fri Jun 13, 2008 9:02 pm Reply with quote
lenny
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Posts: 275




You can't really do anything about that, unless the php script is dumping anything into a javascript already, where it would just be a case of escaping the quotes and adding a semicolon... then doing what you like!

For example, I dealt with a script that did this:

Quote:
...html stuff...
<script>
var abc = "blahblahblah {$php_variable} blah balh blah";
</script>
...html stuff...


The php variable was sanitized with simple "addslashes" so I was able to escape the the initial quotes despite the addslashes, turning it into this:

Quote:
...html stuff...
<script>
var abc = "blahblahblah "; window.location="XSS in here"; // blah balh blah";
</script>
...html stuff...

I did so using
Quote:
"; window.location="XSS in here"; //



Smile
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What if the <> tags are filtered?
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