Microsoft Internet Explorer contains buffer overflow in processing of object types

Overview

A remotely exploitable vulnerability has been discovered in Internet Explorer. Exploitation of this vulnerability may lead to the execution of arbitrary code.

Description

A remotely exploitable buffer overflow vulnerability has been discovered in Internet Explorer versions 5.1, 5.5 and 6.0. The <object> tag contains a “type” field used to determine how Internet Explorer should treat an object. It is possible to bypass the buffer checks on the input to the “type” field by using a specific character and cause a buffer overflow.

An attacker could create an HTML file that includes a malicious <OBJECT> tag to execute arbitrary code on the victim’s machine. When a victim using a vulnerable version of IE, or other applications that use IE as their HTML interpreter, visits the malicious file (via web page, email message, file sharing, etc.), the attacker-supplied code will be executed.

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Impact

Exploitation of this vulnerability may lead to the execution of arbitrary code with the privileges of the current user.

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Solution

Microsoft has released MS03-020 to resolve this issue.

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Vendor Information

679556

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Microsoft Corporation __ Affected

Updated: June 04, 2003

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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

Addendum

Please see <http://www.microsoft.com/security/security_bulletins/ms03-020.asp&gt;.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23679556 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.microsoft.com/windows/ie/downloads/critical/818529/default.asp&gt;
• <http://www.microsoft.com/security/security_bulletins/ms03-020.asp&gt;
• <http://www.eeye.com/html/Research/Advisories/AD20030604.html&gt;
• <http://www.secunia.com/advisories/8943/&gt;

Acknowledgements

Thanks to Microsoft Security and eEye Digital Security for reporting this vulnerability.

This document was written by Jason A Rafail.

Other Information

CVE IDs:	CVE-2003-0344
Severity Metric:	17.47 Date Public: