Microsoft Internet Explorer contains buffer overflow in processing of object types

ID VU:679556
Type cert
Reporter CERT
Modified 2003-06-04T20:33:00



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


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.


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


Microsoft has released MS03-020 to resolve this issue.

Vendor Information


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__ Microsoft Corporation

Updated: June 04, 2003


__ 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.


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CVSS Metrics

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


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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:
| 2003-06-04
Date First Published: | 2003-06-04
Date Last Updated: | 2003-06-04 20:33 UTC
Document Revision: | 11