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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2001-0347
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-031
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6665
• http://www.ciac.org/ciac/bulletins/l-092.shtml
• http://www.osvdb.org/5686
• http://www.securityfocus.com/bid/2847