Microsoft Windows 2000 Telnet Service Backspace denial of service

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 2000 and classified as problematic. The affected element is an unknown function of the component Telnet Service. Executing a manipulation as part of Backspace can lead to denial of service. This vulnerability is handled as CVE-2001-0348. Additionally, an exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as problematic was found in Microsoft Windows 2000 (Operating System). This vulnerability affects an unknown code of the component Telnet Service. The manipulation as part of a Backspace leads to a denial of service vulnerability. 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. CVE summarizes:

Microsoft Windows 2000 telnet service allows attackers to cause a denial of service (crash) via a long logon command that contains a backspace.

The issue has been introduced in 02/17/2000. The weakness was released 07/21/2001 by Michal Zalewski (BindView) with Microsoft as MS01-031 as confirmed bulletin (Technet). The advisory is shared for download at microsoft.com. This vulnerability was named CVE-2001-0348. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Shell File. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 520 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 38015 (Microsoft Windows 2000 Telnet Multiple DoS 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 (6666), Exploit-DB (20907), SecurityFocus (BID 2838†) and Vulnerability Center (SBV-4282†). Entries connected to this vulnerability are available at VDB-17053, VDB-17054, VDB-17055 and VDB-17058. 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: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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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 🔍
07/21/2001 +44 days 🔍
07/21/2001 +0 days 🔍
05/10/2004 +1024 days 🔍
07/07/2014 +3710 days 🔍
10/06/2025 +4109 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS01-031
Researcher: Michal Zalewski (BindView)
Organization: Microsoft
Status: Confirmed

CVE: CVE-2001-0348 (🔍)
GCVE (CVE): GCVE-0-2001-0348
GCVE (VulDB): GCVE-100-17056
X-Force: 6666 - Microsoft Windows 2000 Telnet username denial of service
SecurityFocus: 2838 - Microsoft Windows 2000 Telnet Username DoS Vulnerability
Vulnerability Center: 4282 - [MS01-031] DoS in Microsoft Windows 2000 Telnet Service via Malformed Logon Command, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/07/2014 15:33
Updated: 10/06/2025 18:15
Changes: 07/07/2014 15:33 (75), 05/21/2019 15:45 (2), 02/02/2025 09:11 (17), 10/06/2025 18:15 (2)
Complete: 🔍
Cache ID: 216::103

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