Title: Microsoft Windows 2000 Telnet Username DoS Vulnerability
Severity: MODERATE
Description:
Microsoft Windows 2000 ships with a telnet service. Due to a flaw in the implementation of the telnet service, it is possible for a remote client to cause a denial of service on the host.
By design, the telnet service will drop a connection if an exceptionally long string of characters are received in the supplied username.
However, if approximately 4300 characters already exist in the input buffer and approximately 127 ascii encoded backspaces (0x7b) are submitted, the telnet service will crash.
A restart of the service is required in order to regain normal functionality.
This vulnerability may be the result of a buffer overflow, although not verified this could lead to the execution of arbitrary code on the target host.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Datacenter Server
- Microsoft Windows 2000 Datacenter Server SP1
- Microsoft Windows 2000 Datacenter Server SP2
- Microsoft Windows 2000 Professional
- Microsoft Windows 2000 Professional SP1
- Microsoft Windows 2000 Professional SP2
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
References:
- Microsoft: Microsoft Security Bulletin MS01-031
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