vuln.sg  PMSS-USA-DecrTD-Ziperto.rar

vuln.sg Vulnerability Research Advisory

AceFTP FTP-Client Directory Traversal Vulnerability

by Tan Chew Keong
Release Date: 2008-06-27

PMSS-USA-DecrTD-Ziperto.rar   [en] [jp]

PMSS-USA-DecrTD-Ziperto.rar 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.


PMSS-USA-DecrTD-Ziperto.rar Tested Versions


PMSS-USA-DecrTD-Ziperto.rar 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.


PMSS-USA-DecrTD-Ziperto.rar POC / Test Code

Please download the POC here and follow the instructions below.

Pmss-usa-decrtd-ziperto.rar Page

: The core mechanic revolves around collecting and using stickers to perform attacks. Every action in battle—from jumping to using a hammer—consumes a sticker from your inventory.

: Unlike previous RPG-heavy entries, this title focuses more on light platforming and using specific stickers to alter the environment (Paperize mode) to progress. Technical Details Platform : Nintendo 3DS Developer : Intelligent Systems Genre : Action-Adventure / Puzzle PMSS-USA-DecrTD-Ziperto.rar

Here are the key features and characteristics of this specific file and the game it contains: File-Specific Features : The core mechanic revolves around collecting and

: The game features a distinct visual style where the world and characters are made of paper, cardboard, and tape, leading to unique environmental puzzles. leading to unique environmental puzzles.


PMSS-USA-DecrTD-Ziperto.rar Patch / Workaround

Avoid downloading files/directories from untrusted FTP servers.


PMSS-USA-DecrTD-Ziperto.rar 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.


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