Microsoft Internet Explorer does not properly handle cached HTTPS contents

2004-10-19T00:00:00
ID VU:795720
Type cert
Reporter CERT
Modified 2004-10-21T14:58:00

Description

Overview

Microsoft Internet Explorer fails to properly validate cached HTTPS contents, allowing an attacker to obtain information or spoof information on a secure web site.

Description

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.


Impact

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.


Solution

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):

  1. In Internet Explorer, click Internet Options on the Tools menu.
  2. Click the Advanced tab.
  3. Under Settings, scroll to Security.
  4. Under Settings, in the Security section, click Do not save encrypted pages to disk.
  5. Click OK two times to return to Internet Explorer.

Vendor Information

795720

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__ Microsoft Corporation

Updated: October 15, 2004

Status

__ Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

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.

CVSS Metrics

Group | Score | Vector
---|---|---
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | | N/A

References

  • <http://www.acrossecurity.com/aspr/ASPR-2004-10-13-1-PUB.txt>
  • <http://www.microsoft.com/technet/security/bulletin/MS04-038.mspx>
  • <http://securitytracker.com/alerts/2004/Oct/1011642.html>
  • <http://xforce.iss.net/xforce/xfdb/17654>

Credit

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.

Other Information

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