Microsoft Internet Explorer 4.0/4.0.1/5.0/5.01 ActiveX Parameter Component memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Internet Explorer 4.0/4.0.1/5.0/5.01. This affects an unknown part of the component ActiveX Parameter Handler. Performing a manipulation of the argument Component results in memory corruption. This vulnerability is reported as CVE-2000-0464. The attack is possible to be carried out remotely. No exploit exists. Due to its background and reception, this vulnerability has an historic impact. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Internet Explorer 4.0/4.0.1/5.0/5.01 (Web Browser). It has been classified as very critical. This affects some unknown processing of the component ActiveX Parameter Handler. The manipulation of the argument component 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 summary by CVE is:

Internet Explorer 4.x and 5.x allows remote attackers to execute arbitrary commands via a buffer overflow in the ActiveX parameter parsing capability, aka the "Malformed Component Attribute" vulnerability.

The issue has been introduced in 04/01/1997. The weakness was disclosed 05/17/2000 as MS00-033 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is uniquely identified as CVE-2000-0464. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/21/2026). It is expected to see the exploit prices for this product decreasing in the near future.Due to its background and reception, this vulnerability has a historic impact.

The vulnerability was handled as a non-public zero-day exploit for at least 1142 days. During that time the estimated underground price was around $25k-$100k.

Upgrading to version 5.5 eliminates this vulnerability. Applying the patch MS00-033 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (4502), SecurityFocus (BID 1223†) and Vulnerability Center (SBV-4209†). The entries VDB-15545 and VDB-15568 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 9.2

VulDB Base Score: 9.6
VulDB Temp Score: 9.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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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: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Internet Explorer 5.5
Patch: MS00-033

Timelineinfo

04/01/1997 🔍
05/17/2000 +1142 days 🔍
05/17/2000 +0 days 🔍
05/17/2000 +0 days 🔍
05/17/2000 +0 days 🔍
05/17/2000 +0 days 🔍
04/28/2004 +1442 days 🔍
06/24/2014 +3709 days 🔍
04/21/2026 +4319 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS00-033
Status: Confirmed

CVE: CVE-2000-0464 (🔍)
GCVE (CVE): GCVE-0-2000-0464
GCVE (VulDB): GCVE-100-15567
X-Force: 4502
SecurityFocus: 1223 - MS IE ActiveX Combined Component Attributes Vulnerability
Vulnerability Center: 4209 - [MS00-033] Microsoft Internet Explorer Malformed Component Attribute Buffer Overflow, Medium

See also: 🔍

Entryinfo

Created: 06/24/2014 17:50
Updated: 04/21/2026 15:41
Changes: 06/24/2014 17:50 (51), 04/07/2017 12:06 (20), 04/21/2026 15:41 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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