| vuln.sg Vulnerability Research Advisory |
by Tan Chew Keong 
Summary
A vulnerability has been found within the FTP client in AceFTP. When exploited, this vulnerability allows an anonymous attacker to write files to arbitrary locations on a Windows user's system.
Tested Versions
Details
This advisory discloses a vulnerability within the FTP client in AceFTP. When exploited, this vulnerability allows an anonymous attacker to write files to arbitrary locations on a Windows user's system. The FTP client does not properly sanitise filenames containing directory traversal sequences (forward-slash) that are received from an FTP server in response to the LIST command. An example of such a response from a malicious FTP server is shown below. Response to LIST (forward-slash): -rw-r--r-- 1 ftp ftp 20 Mar 01 05:37 /../../../../../../../../../testfile.txt\r\n By tricking a user to download a directory from a malicious FTP server that contains files with fowward-slash directory traversal sequences in their filenames, it is possible for the attacker to write files to arbitrary locations on a user's system with privileges of that user. An attacker can potentially leverage this issue to write files into a user's Windows Startup folder and execute arbitrary code when the user logs on.
POC / Test Code
Please download the POC here and follow the instructions below. Deus-ex-mankind-divided-digital-deluxe -: An additional in-game mission set in Prague. : A collection of themed gear including the Intruder , Enforcer , and Classic sets, plus an extra 1000 Credits and 1 Praxis Kit. Availability & Platforms deus-ex-mankind-divided-digital-deluxe The is a comprehensive bundle that includes the base game along with its Season Pass and several digital bonuses . As of April 2026, it remains a popular way to access the full narrative of Adam Jensen's mission in 2029. Included Content : An additional in-game mission set in Prague : 4 Praxis Kits, 5000 Credits, 1000 Weapon Parts, and booster items for the Breach game mode. and Classic sets : Includes the Assault Pack and Tactical Pack , featuring specialized weapons and equipment. The Digital Deluxe Edition is available on major digital storefronts:
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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