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Fix a few things in the YouTube documentation as mentioned by Everah and kuza55 (sorry kuza55, still haven't acted completely on your requests).

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git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@619 48356398-32a2-884e-a903-53898d9a118a
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Edward Z. Yang 2006-12-26 04:09:23 +00:00
parent 688b1833f5
commit 4c54283642
1 changed files with 12 additions and 7 deletions
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19
docs/enduser-youtube.html
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@ -26,9 +26,9 @@ content in their pages is something that a lot of people like.</p>
you will definitely be slammed by a manner of nasties that can be
embedded in things from your run of the mill Flash movie to
<a href="http://blog.spywareguide.com/2006/12/myspace_phish_attack_leads_use.html">Quicktime movies</a>.
Allowing users to tell the browser to load content from other websites
is intrinsically dangerous: there already security risks associated with
letting users include images from other sites!</p>
Even <code>img</code> tags, which HTML Purifier allows by default, can be
dangerous. Be distrustful of anything that tells a browser to load content
from another website automatically.</p>
<p>Luckily for us, however, whitelisting saves the day. Sure, letting users
include any old random flash file could be dangerous, but if it's
@ -147,13 +147,18 @@ the user's operating system/browser. You need to either cap it by limiting
the amount of digits allowed in the regex or using a callback to check the
number.</p>
<h3>Trusts YouTube's security</h3>
<h3>Trusts media's host's security</h3>
<p>By allowing this code onto our website, we are trusting that YouTube has
tech-savvy enough people not to allow their users to inject malicious
code into the Flash files. An exploit on YouTube means an exploit on your
site, and when you start allowing shadier sites, remember that trust
is important.</p>
code into the Flash files. An exploit on YouTube means an exploit on your
site. Even though YouTube is run by the reputable Google, it
<a href="http://ha.ckers.org/blog/20061213/google-xss-vuln/">doesn't</a>
mean they are
<a href="http://ha.ckers.org/blog/20061208/xss-in-googles-orkut/">invulnerable.</a>
You're putting a certain measure of the job on an external provider (just as
you have by entrusting your user input to HTML Purifier), and
it is important that you are cognizant of the risk.</p>
<h3>Poorly written adaptations compromise security</h3>