Microsoft Exchange/IIS URL Memory denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Microsoft Exchange and IIS and classified as problematic. The impacted element is an unknown function of the component URL Handler. This manipulation causes denial of service (Memory). This vulnerability is registered as CVE-2001-0146. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft Exchange and IIS (Groupware Software) (the affected version unknown). Affected by this vulnerability is an unknown part of the component URL Handler. The manipulation with an unknown input leads to a denial of service vulnerability (Memory). The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

IIS 5.0 and Microsoft Exchange 2000 allow remote attackers to cause a denial of service (memory allocation error) by repeatedly sending a series of specially formatted URL s.

The weakness was published 06/02/2001 by Kevin Kotas with Microsoft as confirmed advisory (CERT.org). The advisory is shared at kb.cert.org. This vulnerability is known as CVE-2001-0146. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 74149 (Microsoft Exchange 2000 Malformed URL Service Failure Vulnerability (MS01-014)).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (6171), SecurityFocus (BID 2441†) and Vulnerability Center (SBV-799†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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

Name: Memory
Class: Denial of service / Memory
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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/01/2001 🔍
06/02/2001 +93 days 🔍
06/02/2001 +0 days 🔍
06/02/2001 +0 days 🔍
02/04/2003 +612 days 🔍
07/04/2014 +4168 days 🔍
10/08/2025 +4114 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: kb.cert.org
Researcher: Kevin Kotas
Organization: Microsoft
Status: Confirmed

CVE: CVE-2001-0146 (🔍)
GCVE (CVE): GCVE-0-2001-0146
GCVE (VulDB): GCVE-100-16705
CERT: 🔍
X-Force: 6171 - Microsoft IIS and Exchange malformed URL request denial of service
SecurityFocus: 2441 - Microsoft Exchange 2000 / IIS 5.0 Multiple Invalid URL Request DoS Vulnerability
Vulnerability Center: 799 - [MS01-014] DoS in Microsoft IIS/Exchange 2000 via Multiple Invalid URL Requests, High

Entryinfo

Created: 07/04/2014 11:22
Updated: 10/08/2025 07:17
Changes: 07/04/2014 11:22 (63), 01/21/2025 07:07 (17), 10/08/2025 07:17 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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