Microsoft Windows 2000 Telnet Domain User information disclosure

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 Windows 2000 and classified as problematic. Impacted is an unknown function of the component Telnet Domain User Handler. Performing a manipulation results in information disclosure (User). This vulnerability is known as CVE-2001-0347. No exploit is available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Microsoft Windows 2000 (Operating System). This affects an unknown part of the component Telnet Domain User Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (User). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Information disclosure vulnerability in Microsoft Windows 2000 telnet service allows remote attackers to determine the existence of user accounts such as Guest, or log in to the server without specifying the domain name, via a malformed userid.

The issue has been introduced in 02/17/2000. The weakness was published 06/07/2001 with Microsoft as MS01-031 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is uniquely identified as CVE-2001-0347. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 476 days. During that time the estimated underground price was around $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38017 (Microsoft W2K Telnet Various Domain User Account Access Vulnerability).

Applying the patch MS01-031 is able to eliminate this problem. The bugfix is ready for download at microsoft.com.

The vulnerability is also documented in the databases at X-Force (6665), SecurityFocus (BID 2847†), OSVDB (5686†) and Vulnerability Center (SBV-4281†). Similar entries are available at VDB-17053, VDB-17054, VDB-17056 and VDB-17058. Be aware that VulDB is the high quality source for 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: User
Class: Information disclosure / User
CWE: CWE-200 / CWE-284 / CWE-266
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS01-031
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

02/17/2000 🔍
06/07/2001 +476 days 🔍
06/07/2001 +0 days 🔍
06/07/2001 +0 days 🔍
07/21/2001 +44 days 🔍
04/09/2004 +992 days 🔍
05/10/2004 +31 days 🔍
07/07/2014 +3710 days 🔍
10/06/2025 +4109 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS01-031
Organization: Microsoft
Status: Confirmed

CVE: CVE-2001-0347 (🔍)
GCVE (CVE): GCVE-0-2001-0347
GCVE (VulDB): GCVE-100-17055
X-Force: 6665 - Microsoft Windows 2000 Telnet service weak domain authentication
SecurityFocus: 2847 - Microsoft W2K Telnet Various Domain User Account Access Vulnerability
OSVDB: 5686 - Microsoft Windows Telnet Service Account Information Disclosure
Vulnerability Center: 4281 - [MS01-031] Microsoft Windows 2000 Telnet Server Reveals Account Names, Low

See also: 🔍

Entryinfo

Created: 07/07/2014 15:32
Updated: 10/06/2025 18:15
Changes: 07/07/2014 15:32 (72), 05/21/2019 15:31 (2), 10/06/2025 18:15 (18)
Complete: 🔍
Cache ID: 216::103

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