| 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. Boyspycam432.mp4 Apr 2026"BoySpyCam432.mp4" appears to be a video file captured using a camera, likely a spy camera or a hidden camera, given the "SpyCam" part of the filename. The ".mp4" extension indicates that the file is encoded in MPEG-4 Part 14 format, a widely used and versatile video file format. If you have any more specific information or context about "BoySpyCam432.mp4", I'd be happy to try and provide a more detailed write-up. BoySpyCam432.mp4 BoySpyCam432.mp4 MP4 (MPEG-4 Part 14) I can create a general write-up about a hypothetical video file named "BoySpyCam432.mp4". Please note that I'll provide a neutral and informative piece. "BoySpyCam432
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
| Contact |
| For further enquries, comments, suggestions or bug reports, simply email them to |