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CERT Coordination Center


SAP AG SAPgui EAI WebViewer3D ActiveX control stack buffer overflow

Vulnerability Note VU#985449

Original Release Date: 2009-03-31 | Last Revised: 2009-04-13

Overview

The Siemens Unigraphics Solutions Teamcenter Visualization EAI WebViewer3D ActiveX control, which comes with SAPgui, contains a stack buffer overflow. This may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

SAP AG SAPgui includes an ActiveX control called EAI WebViewer3D, which is produced by Unigraphics Solutions, a division of Siemens. The EAI WebViewer3D ActiveX control, which is provided by webviewer3d.dll, contains a stack buffer overflow in the SaveViewToSessionFile() method. Although the ActiveX control is produced by Siemens, it is reported to only be used by SAP.

Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), an attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause the web browser to crash.

Solution

Apply an update

This issue is addressed with SAPgui 7.10 Patch Level 9. This update sets the kill bit for the vulnerable control, since it was not intended for use in Internet Explorer. Although the SAPgui 7.10 Patch Level 8 release notes indicate that the control is disabled via the kill bit, please note that the kill bit was not properly set until Patch Level 9. Please also consider the following workarounds:


Disable the EAI WebViewer3D ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:

{AFBBE070-7340-11d2-AA6B-00E02924C34E}
More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{AFBBE070-7340-11d2-AA6B-00E02924C34E}]
"Compatibility Flags"=dword:00000400
Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document. 

Vendor Information

985449
Expand all

SAP

Notified:  July 21, 2008 Updated:  March 31, 2009

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

This issue is addressed with SAPgui 7.10 Patch Level 9.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Siemens CERT

Notified:  July 07, 2007 Updated:  February 16, 2009

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

This issue is addressed with SAPgui 7.10 Patch Level 9.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Unigraphics Solutions

Notified:  October 29, 2007 Updated:  February 16, 2009

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

This issue is addressed with SAPgui 7.10 Patch Level 9.

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

Credit

This vulnerability was reported by Will Dormann of the CERT/CC.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-4475
Severity Metric: 10.48
Date Public: 2009-03-31
Date First Published: 2009-03-31
Date Last Updated: 2009-04-13 20:05 UTC
Document Revision: 18

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