Re: Need to check pdf for xss
| From: | Sebastian | Date: | Sat, 14 Aug 2010 22:56:10 +0000 |
| Subject: | Re: Need to check pdf for xss | ||
| References: | 1 2 3 4 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-307476@lists.php.net to get a copy of this message | ||
Peter Lind wrote:
> I'm guessing you may have been referring to something like:
> http://kestas.kuliukas.com/JavaScriptImage/ - this actually
> does seem
> to be a valid threat to IE6 and would go undetected by the measures
> proposed. Checking an image for <script> tags seems to the only way to
> check if IE6 will render it as html and whether or not it will cause
> problems.
>
> I don't know if the same vulnerability exists for pdfs - you'd have to
> check security sources for it.
>
> Regards
> Peter
>
THX now I understand why only the first Bytes are checked for tags. I'm
not planing to support IE6. A message with an update link is displayed
if IE6 enters the site.
For other Browser the mime type check with imagick is enough security or
are there better ways?