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WinFtp Server Data Handling Denial of Service Vulnerability
Secunia Advisory: SA23412
Release Date: 2006-12-20
Last Update: 2006-12-22
Popularity: 7,392 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Unpatched

Software:WinFTP Server 2.x

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CVE reference:CVE-2006-6673


Description:
shinnai has discovered a vulnerability in WinFtp Server, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an off-by-one error when processing data received from the client. This can be exploited to crash the service by sending an overly long string (greater than 500 bytes) to the service.

The vulnerability is confirmed in version 2.0.2. Other versions may also be affected.

Solution:
Restrict access to the FTP service.

Provided and/or discovered by:
shinnai

Changelog:
2006-12-22: Added CVE reference.


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