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Directory Traversal Vulnerability in CrossFTP Pro

Advisory ID:HTB22624
Product:CrossFTP
Vendor:CrossFTP Software
Vulnerable Versions:Pro 1.65a and probably prior
Tested Version:Pro 1.65a
Advisory Publication:September 27, 2010 [without technical details]
Vendor Notification:September 27, 2010
Public Disclosure:October 11, 2010
Vulnerability Type:Path Traversal [CWE-22]
CVE Reference:CVE-2010-4153
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 CrossFTP Pro which could be exploited to execute arbitrary code on vulnerable system.

1) Directory Traversal Vulnerability in CrossFTP Pro: CVE-2010-4153
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 CrossFTP Pro 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 HTB22624 - https://www.immuniweb.com/advisory/HTB22624 - Directory Traversal Vulnerability in CrossFTP Pro
[2] CrossFTP - crossftp.com - CrossFTP Pro is a reliable FTP client supporting SFTP, FXP, WebDav, and Amazon S3.
[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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