Microsoft Windows 2000 NTLM Authentication telnet.exe privileges management

CVSS Meta Temp Score
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CTI Interest Score
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8.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 2000. It has been classified as critical. This issue affects some unknown processing of the file telnet.exe of the component NTLM Authentication. The manipulation leads to privileges management. This vulnerability is referenced as CVE-2000-0834. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Microsoft Windows 2000 (Operating System). It has been rated as critical. This issue affects an unknown code block of the file telnet.exe of the component NTLM Authentication. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Windows 2000 telnet client attempts to perform NTLM authentication by default, which allows remote attackers to capture and replay the NTLM challenge/response via a telnet:// URL that points to the malicious server, aka the "Windows 2000 Telnet Client NTLM Authentication" vulnerability.

The issue has been introduced in 02/17/2000. The weakness was published 11/14/2000 with @stake as A091400-1 as not defined advisory (Website). The advisory is shared at atstake.com. The identification of this vulnerability is CVE-2000-0834. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1068 for this issue.

A public exploit has been developed in C++. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 210 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 10519 (MS00-067: Telnet Client NTLM Authentication Vulnerability (272743)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (5242), Exploit-DB (20222), Tenable (10519), SecurityFocus (BID 1683†) and Vulnerability Center (SBV-182†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 9.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

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Nessus ID: 10519
Nessus Name: MS00-067: Telnet Client NTLM Authentication Vulnerability (272743)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
McAfee IPS: 🔍
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ISS Proventia IPS: 🔍

Timelineinfo

02/17/2000 🔍
09/14/2000 +210 days 🔍
09/14/2000 +0 days 🔍
09/25/2000 +11 days 🔍
11/14/2000 +50 days 🔍
11/14/2000 +0 days 🔍
11/14/2000 +0 days 🔍
10/22/2002 +707 days 🔍
06/28/2014 +4267 days 🔍
06/07/2025 +3997 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: A091400-1
Organization: @stake
Status: Confirmed

CVE: CVE-2000-0834 (🔍)
GCVE (CVE): GCVE-0-2000-0834
GCVE (VulDB): GCVE-100-15965
X-Force: 5242 - Microsoft Windows 2000 Telnet client NTLM authentication weakness
SecurityFocus: 1683 - Microsoft Windows 2000 telnet.exe NTLM Authentication Vulnerability
Vulnerability Center: 182 - [MS00-067] Win2000 telnet NTLM sniffing, High

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

Entryinfo

Created: 06/28/2014 15:57
Updated: 06/07/2025 09:49
Changes: 06/28/2014 15:57 (72), 05/05/2019 12:25 (10), 06/07/2025 09:49 (18)
Complete: 🔍
Cache ID: 216::103

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