Microsoft Internet Explorer fails to properly validate cached HTTPS contents, allowing an attacker to obtain information or spoof information on a secure web site.
The HTTPS protocol is used to provide authentication, encryption, integrity, and non-repudiation services to web applications. Microsoft Internet Explorer (IE) does not properly validate cached HTTPS content. An attacker could exploit this vulnerability by creating a web site with the same host name as the legitimate HTTPS protected web site. When the attacker's web site is viewed, the contents are cached. If the attacker redirects the victim's browser to the legitimate web site, the attacker's cached contents are then displayed within the context of that web site. The cached content could include script code, images, or other locally cached items.
An attacker may be able to spoof information on a secure web site. Using script, an attacker may be able to retrieve cookies or other information from a secure web session.
Apply a patch
Apply the patch referenced in MS04-038.
Do not save encrypted pages to disk
To prevent this vulnerability from being exploited, change the IE settings to not save encrypted contents to disk. To make this change, follow these steps (provided by MS04-038):
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Updated: October 15, 2004
No statement is currently available from the vendor regarding this vulnerability.
The vendor has not provided us with any further information regarding this vulnerability.
Please see <http://www.microsoft.com/technet/security/bulletin/ms04-038.mspx>
If you have feedback, comments, or additional information about this vulnerability, please send us email.
Group | Score | Vector
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | | N/A
Thanks to Microsoft for reporting this vulnerability. Microsoft credits Mitja Kolsek from ACROS Security for reporting the vulnerability.
This document was written by Will Dormann.
CVE IDs: | CVE-2004-0845
Severity Metric:** | 9.72
Date Public: | 2004-10-12
Date First Published: | 2004-10-19
Date Last Updated: | 2004-10-21 14:58 UTC
Document Revision: | 8