Title: Microsoft Internet Explorer HTTP Referer Information Disclosure Vulnerability
Severity: MODERATE
Description:
Microsoft Internet Explorer for the Apple Mac platform has been reported prone to an information disclosure vulnerability.
The browser allegedly forwards HTTP Referer data in HTTP requests made from secure HTTPS servers. This behavior does not comply with the HTTP 1.1 RFC and so may present a security risk in certain circumstances. One of these reported circumstances was when a link to a remote HTTP site is followed from Outlook Web Access(HTTPS); data contained in the Referer may include Outlook Inbox Username and Domain name. The most common risk associated with this issue is situations where session IDs or other credentials are included in URIs. If a user were to follow a link from within an HTTPS page, the Referer could be leaked to an external site.
Information gathered by an attacker by exploiting this vulnerability may be used to aid in further attacks launched against the target server.
**Update: It has been reported that this vulnerability affects all versions of Internet Explorer on all platforms. However, Internet Explorer on Windows platforms requires that the HTTPS site be left via a redirection. Other browsers including Netscape version 4 and Opera may also be affected.
Affected Products:
- Microsoft Internet Explorer 5.0
- Microsoft Internet Explorer 5.5
- Microsoft Internet Explorer 5.5 SP1
- Microsoft Internet Explorer 5.5 SP2
- Microsoft Internet Explorer 6.0
- Microsoft Internet Explorer 6.0 SP1
- Microsoft Windows 98SE
- Microsoft Windows ME
- Microsoft Windows Server 2003 Datacenter Edition
- Microsoft Windows Server 2003 Datacenter Edition Itanium
- Microsoft Windows Server 2003 Enterprise Edition
- Microsoft Windows Server 2003 Enterprise Edition Itanium
- Microsoft Windows Server 2003 Standard Edition
- Microsoft Windows Server 2003 Web Edition
- Microsoft Windows XP Home
- Microsoft Windows XP Professional
References:
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