  
| 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. Idol Janshi Suchie Pie Mecha Limited Edition Sa... 📌(literally "Idol Mahjong Player Suchie-Pai Really Limited Edition") is a Japanese mahjong game compilation released by Jaleco on November 26, 1998, for the Sega Saturn . It was created to celebrate the 5th anniversary of the franchise and features character designs by Kenichi Sonoda . Key Features and Content : A modern port of this edition was released for the Nintendo Switch in December 2022 as part of the Idol Janshi Suchie-Pai Saturn Tribute collection. Where to Find It Idol Janshi Suchie Pie Mecha Limited Edition Sa... : A new short adventure game that serves as an addendum to the Doki Doki Nightmare storyline. Where to Find It : A new short As a vintage Japanese import, physical copies are primarily available through specialized retro gaming retailers and auction sites: : Often carries limited editions and related franchise : Occasionally auctions promotional materials like the B2-sized poster for the Mecha Limited Edition. : Listings for the Mecha Limited Edition set sometimes appear, often bundled with the "Secret Album" fan disc. : Often carries limited editions and related franchise merchandise.
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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