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vuln.sg Vulnerability Research Advisory

AceFTP FTP-Client Directory Traversal Vulnerability

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

Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File   [en] [jp]

Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File 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.


Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File Tested Versions


Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File 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.


Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File POC / Test Code

Please download the POC here and follow the instructions below.

Samsung A217f U7 Android 11 Root File?q=samsung A217f U7 Android 11 Root File May 2026

The "complete story" for rooting this specific binary version involves these critical steps: :

Turn on and USB Debugging . If OEM Unlocking is missing, connect to Wi-Fi and adjust the system date back a few months to force it to appear .

Boot into (hold Volume Up + Volume Down and connect USB) . The "complete story" for rooting this specific binary

These video guides provide visual walk-throughs for unlocking the bootloader and flashing the A217F U7 root files:

Extract the AP file and patch it using the on your phone, or use a pre-patched A217F U7 Root File . Flash with Odin : Put the phone back into Download Mode . Direct Download Link A pre-patched, fixed root file

Rooting the on Android 11 with Binary 7 (U7) requires unlocking the bootloader and flashing a patched firmware file . Direct Download Link

A pre-patched, fixed root file for the A217F U7 Android 11 version (which specifically addresses the "Hang on Logo" issue) is available through community sources like MobileChaCha . Finalize Root :

In the Odin Tool, load the patched root file into the . Uncheck Auto Reboot in Odin's options, then click Start . Finalize Root :


Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File Patch / Workaround

Avoid downloading files/directories from untrusted FTP servers.


Samsung A217F U7 Android 11 Root File?q=Samsung A217F U7 Android 11 Root File 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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