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.
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: Open the Linux terminal and run installation commands (e.g., sudo apt install wine Run Installer : Move your to the "Linux files" folder and run it by typing wine setup.exe in the terminal. Resolution Settings
– Works flawlessly on most Chromebooks
Bottles is best installed via Flatpak to ensure all dependencies are included. Open your terminal and run: flatpak install flathub com.usebottles.bottles Use code with caution. Step 2: Create a Gaming Bottle Launch . Click the + (plus) icon or Create Bottle . Name your bottle (e.g., PvZ_GOTY ). Select the Gaming environment preset. Click Create and wait for the configuration to finish. Step 3: Run the Installer Open your newly created bottle and click on Run Executable .
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This comprehensive guide covers multiple installation methods, from using Steam via Proton to utilizing Wine and Bottling software. Prerequisites: Set Up Linux on Your Chromebook
This is an open-source game manager that simplifies installation. Use the Lutris Installation Page to find automated scripts for various versions.
Sometimes the cursor clicks slightly off-center inside the Linux window container. : Open the Linux terminal and run installation commands (e
– May need winecfg to set Windows 7 mode
Here is a condensed version of the process:
: Go to Chromebook Settings > Developers > Linux development environment > Turn On. Step 2: Create a Gaming Bottle Launch
Hope you enjoy playing Plants vs. Zombies GOTY on your Chromebook!
The icon will now appear in your Chromebook's app drawer under the Linux apps folder. Troubleshooting Common Chromebook Issues No Sound / Audio Lag
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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.