Two vulnerabilities have been discovered in Home FTP Server, which can be exploited by malicious users to access arbitrary files on a vulnerable system, and by malicious people to cause a DoS (Denial of Service)

1) An input validation error makes it possible to escape the FTP root and retrieve arbitrary files on the system via directory traversal attacks using the "../../" character sequence.

2) An error in the handling of the USER command with an overly long username can be exploited to cause the service to consume large amount of CPU resources and stop responding to requests.

The vulnerabilities have been confirmed in version r1.0.7 (build 45). Other versions may also be affected.

Solution
Filter malicious characters and character sequences in a FTP proxy.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Donato Ferrante
2) cvh, Security Science Researchers Institute Of Iran.

Changelog
Further details available to Secunia VIM customers

Original Advisory
http://www.autistici.org/fdonato/advisory/HomeFtpServer1.0.7-adv.txt
http://kapda.ir/advisory-211.html

Deep Links
Links available to Secunia VIM customers