Microsoft Internet Explorer 3.0.2/4.0/4.0.1 memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Internet Explorer 3.0.2/4.0/4.0.1. Impacted is an unknown function. The manipulation results in memory corruption. This vulnerability is reported as CVE-1999-0331. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Microsoft Internet Explorer 3.0.2/4.0/4.0.1 (Web Browser). Affected is an unknown part. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability.

The issue has been introduced in 03/20/1997. The weakness was disclosed 01/01/1998. This vulnerability is traded as CVE-1999-0331. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 287 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 5.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

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Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Memory corruption
CWE: CWE-119
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

03/20/1997 🔍
01/01/1998 +287 days 🔍
01/01/1998 +0 days 🔍
06/18/2014 +6012 days 🔍
04/17/2026 +4321 days 🔍

Sourcesinfo

Vendor: microsoft.com

Status: Confirmed

CVE: CVE-1999-0331 (🔍)
GCVE (CVE): GCVE-0-1999-0331
GCVE (VulDB): GCVE-100-14052

Entryinfo

Created: 06/18/2014 18:14
Updated: 04/17/2026 05:29
Changes: 06/18/2014 18:14 (38), 04/07/2017 12:05 (10), 04/17/2026 05:29 (18)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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