| 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. Download Zdorovie102022 Rar | CERTIFIED ✧ |Because modern operating systems like Windows and macOS do not natively support the creation or extraction of RAR files without third-party tools, you will need dedicated software to access its contents. : WinRAR is the official utility for managing these files. : The ZArchiver app is a common choice for opening and extracting RAR files on mobile devices. Safety Best Practices Download Zdorovie102022 rar 7-Zip is a popular, free, open-source alternative that can extract almost any RAR archive. Because modern operating systems like Windows and macOS Downloading archive files from the internet carries inherent risks, as they can sometimes serve as containers for malware. What software can open a RAR file? - Facebook Download Zdorovie102022 rar
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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