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Insecure Library Loading
Moderately critical

Home Ftp Server Directory Traversal and Denial of Service

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Release Date:  2005-08-25    Last Update:  2006-01-25    Views:  8,318

Secunia Advisory SA16556

Where:

From remote

Impact:

Exposure of system information, Exposure of sensitive information, DoS

Solution Status:

Unpatched

CVE Reference(s):

Description


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.

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

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Home Ftp Server Directory Traversal and Denial of Service

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