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Directory Traversal Vulnerability in SoftX FTP Client

Advisory ID:HTB22541
Product:SoftX FTP Client
Vendor:SoftX.Org
Vulnerable Versions:3.3 for windows and probably prior
Tested Version:3.3 for windows
Advisory Publication:July 27, 2010 [without technical details]
Vendor Notification:July 27, 2010
Public Disclosure:August 10, 2010
Vulnerability Type:Path Traversal [CWE-22]
CVE Reference:CVE-2010-3096
Risk Level:High
CVSSv2 Base Score:7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerability in SoftX FTP Client which could be exploited to execute arbitrary code on vulnerable system.

1) Directory Traversal Vulnerability in SoftX FTP Client: CVE-2010-3096
The vulnerability exists due to insufficient sanitation of the downloaded filename. A remote attacker controlling an FTP server can trick user into downloading file with specially crafted filename, containing directory traversal sequences (e.g. "..\..\..\..\..\..\..\somefile.exe") and write it into arbitrary locations on the target system. Successful exploitation might allow remote code execution but requires that victim uses SoftX FTP Client to connect to the FTP server and download a malicious file.


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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22541 - https://www.htbridge.com/advisory/HTB22541 - Directory Traversal Vulnerability in SoftX FTP Client
[2] SoftX FTP - softx.org - SoftX FTP is a FTP Client for Windows, Windows Mobile and Pocket PC, that gives you a fast, easy and reliable way to transfer files and directories between your personal computer or mobile device, and the FTP server.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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