Re: IE 5.22 on Mac Transmitting HTTP Referer from Secure Page
Date: Tue, 30 Dec 2003 13:50:27 -0800 To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
This applies to ALL versions of Internet Explorer on all systems, though
IE on Windows require that the HTTPS site is left through a redirection.
I verified this on IE 5, 5.5, 6 and 6SP1.
As an easily demonstrated example, open your Windows IE and go to
then to verify that no referer is typically sent (the expected behavior)
write the following in your Address Bar
The redirect script has to be on the same domain. It is not uncommon to
see redirectors on sites protected by SSL, most typically webmail
Lots of other browsers have been vulnerable to this, including Netscape
4 and Opera.
Senior Security Researcher
24 Corporate Plaza #180
Newport Beach, CA 92660
PivX defines "Proactive Threat Mitigation". Get a FREE Beta Version of
From: email@example.com [mailto:firstname.lastname@example.org]
Sent: Wednesday, December 24, 2003 8:16 AM
Subject: IE 5.22 on Mac Transmitting HTTP Referer from Secure Page
Documented instance of Internet Explorer 5.22 on a Mac transmitting an
HTTP Referer header from a link on a secure page (https):
This is clearly covered in the HTTP 1.1 spec (RFC 2616), Section 15.1.3,
"Encoding Sensitive Information in URI's":
"Clients SHOULD NOT include a Referer header field in a (non-secure)
HTTP request if the referring page was transferred with a secure
Editor's Note: The 43rd Most Powerful Person in Networking says...
Want to reply to the person who sent this message? This list is configured such that just hitting reply is going to result in the message coming to the list, not to the individual who sent the message. This was done to help reduce the number of Out of Office messages posters received. So if you want to send a reply just to the poster, you''ll have to copy their email address out of the message and place it in your TO: field.