Microsoft Internet Explorer 4.0 OBJECT CLASSID denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Microsoft Internet Explorer 4.0. This affects an unknown part of the component OBJECT Handler. Such manipulation of the argument CLASSID leads to denial of service. This vulnerability is uniquely identified as CVE-1999-1447. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 4.0 (Web Browser). It has been rated as problematic. Affected by this issue is an unknown part of the component OBJECT Handler. The manipulation of the argument CLASSID with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

Internet Explorer 4.0 allows remote attackers to cause a denial of service (crash) via HTML code that contains a long CLASSID parameter in an OBJECT tag.

The issue has been introduced in 04/01/1997. The weakness was disclosed 07/28/1998 as not defined posting (Bugtraq). The advisory is shared for download at marc.theaimsgroup.com. This vulnerability is handled as CVE-1999-1447. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability was handled as a non-public zero-day exploit for at least 483 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 5.0 eliminates this vulnerability.

marc.theaimsgroup.com is providing further details. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Internet Explorer 5.0

Timelineinfo

04/01/1997 🔍
07/28/1998 +483 days 🔍
07/28/1998 +0 days 🔍
06/19/2014 +5805 days 🔍
04/17/2026 +4320 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: marc.theaimsgroup.com
Status: Confirmed

CVE: CVE-1999-1447 (🔍)
GCVE (CVE): GCVE-0-1999-1447
GCVE (VulDB): GCVE-100-14192
Misc.: 🔍

Entryinfo

Created: 06/19/2014 16:52
Updated: 04/17/2026 14:44
Changes: 06/19/2014 16:52 (44), 04/07/2017 12:05 (10), 04/17/2026 14:44 (17)
Complete: 🔍
Cache ID: 216::103

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