[UNIX] Mozilla Referer Privacy Leak
From: support@securiteam.comDate: 09/12/02
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From: support@securiteam.com To: list@securiteam.com Date: Thu, 12 Sep 2002 08:32:53 +0200 (CEST)
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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Mozilla Referer Privacy Leak
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SUMMARY
There is a serious privacy leak in Mozilla that reveals the URL of the
page you are visiting to the web server of the page you visited last. The
leak not only occurs for links followed on the page (that would not be
particularly serious) but also for URLs entered manually or picked from
the bookmarks.
DETAILS
Vulnerable systems:
* Mozilla versions 1.0, 1.0.1, 1.1 and older versions
* Mozilla based browsers such as Netscape 7 and Galeon.
The problem is that HTTP requests that are launched from a page's
"onunload" handler have the wrong referer (sic): They get the referer of
the next page the user is about to visit.
Demonstration:
A working demonstration is available at:
<http://members.ping.de/~sven/mozbug/refcook.html>
http://members.ping.de/~sven/mozbug/refcook.html
Vendor response:
This is bug 145579 from the Bugzilla database. It is a couple of months
old now therefore Sven is disclosing this vulnerability in hope that it
will initiate the fixing process.
Workaround:
Disable Javascript.
ADDITIONAL INFORMATION
The information has been provided by <mailto:sn@neopoly.com> Sven
Neuhaus.
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