by Tan Chew Keong
Release Date: 2008-06-27
[en] [jp]
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.
Re Volt-drmfree 〈AUTHENTIC ◆〉
The phrase typically appears in lists of game downloads on sites like OceanofGames , referring to a version of the classic radio-controlled car racing game, Re-Volt , that has had its Digital Rights Management (DRM) removed. Understanding Re-Volt (DRM-Free)
: A "DRM-FREE" version means the game can be installed and played without needing persistent online authentication, specific launchers, or hardware-based checks. This is common for older "abandonware" titles or games sold on platforms like GOG.com , which specializes in DRM-free releases. Re Volt-DRMFREE
: Re-Volt is a 1999 racing title where players control RC cars through varied environments like supermarkets, museums, and toy shops. The phrase typically appears in lists of game
: Because the original source code was leaked and then officially licensed to fans, the game lives on through the RVGL (Re-Volt Go Local) project. This community-maintained version acts as a modern, DRM-free engine that supports wide screens, high resolutions, and online multiplayer. Ocean of . com : Re-Volt is a 1999 racing title where
Patch / Workaround
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered.
2008-06-16 - Vulnerability Details Sent to Vendor via online support form (no reply).
2008-06-18 - Vulnerability Details Sent to Vendor again via online support form (no reply).
2008-06-25 - Vulnerability Details Sent to Vendor again via online support form (no reply).
2008-06-27 - Public Release.