| 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. Return Of The Obra Dinn Free Download V1.2.122 -The ensures the smoothest experience yet, polishing technical performance while maintaining the haunting atmosphere that won the game numerous "Game of the Year" accolades. Why It’s a Must-Play Unlike many modern detective games, Obra Dinn doesn't hold your hand. There are no waypoints or glowing quest markers. You must rely on your own logic, ears (the sound design is incredible), and observational skills. When you finally lock in three correct identities and hear that triumphant musical cue, the sense of accomplishment is unmatched. Return of the Obra Dinn Free Download v1.2.122 Rediscover the Mystery: Return of the Obra Dinn (v1.2.122) If you are a fan of investigative puzzles and unique visual storytelling, is likely already on your radar. Created by Lucas Pope (the mind behind Papers, Please ), this game is a masterclass in deduction, presented in a striking 1-bit monochromatic art style that feels like a vintage Mac computer come to life. The Mystery of the Obra Dinn You must rely on your own logic, ears
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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