| 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. Vid-20220713-wa0055mp4_mtape_mp4 May 2026Could you provide more about where you saw this filename or the subject matter of the video you are looking for? Search results for this specific identifier point to several unrelated personal or local videos uploaded around that date, such as: A karate demonstration from a school in Jakarta. A religious celebration siyum for a Baltimore yeshiva. A video regarding animal rescue in Spain. VID-20220713-WA0055mp4_mtape_mp4 This string appears to be a (VID-YYYYMMDD-WAXXXX) for a video received or sent on July 13, 2022. The additional suffix _mtape_mp4 likely indicates a specific processing tag or a duplicate file identifier from a media management tool or a specific hosting platform. Could you provide more about where you saw There is no academic paper or official document specifically titled or about . VID-20220713-WA0055mp4_mtape_mp4
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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