Classic FTP 'LIST' Command Directory Traversal Vulnerability

BID:29846

Info

Classic FTP 'LIST' Command Directory Traversal Vulnerability

Bugtraq ID: 29846
Class: Input Validation Error
CVE: CVE-2008-2894
Remote: Yes
Local: No
Published: Jun 20 2008 12:00AM
Updated: May 07 2015 05:28PM
Credit: Tan Chew Keong
Vulnerable: NCH Software Classic FTP 1.02
Not Vulnerable:

Discussion

Classic FTP 'LIST' Command Directory Traversal Vulnerability

Classic FTP is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user-supplied input.

Exploiting this issue allows an attacker to write arbitrary files to locations outside of the application's current directory. This could help the attacker launch further attacks.

Classic FTP 1.02 for Microsoft Windows is vulnerable; other versions may also be affected.

Exploit / POC

Classic FTP 'LIST' Command Directory Traversal Vulnerability

An attacker can exploit this issue by enticing an unsuspecting victim to connect to a malicious server.

The following proof of concept is available:

Response to LIST:

\..\..\..\..\..\..\..\..\..\testfile.txt\r\n
/../../../../../../../../../testfile.txt\r\n

Solution / Fix

Classic FTP 'LIST' Command Directory Traversal Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

References

Classic FTP 'LIST' Command Directory Traversal Vulnerability

References:

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