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| 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
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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. 5656x3771 Food On Table В· Free Stock Photo"> -The search term "5656x3771 Food on Table" refers to high-resolution, 3:2 aspect ratio stock images typically found on platforms like Pexels, Unsplash, and Pixabay. These images generally showcase flat-lay or high-angle views of arranged food, featuring natural lighting and high-quality, free-to-use commercial licensing. Explore available options, such as the curated collection of food-focused photos at Pexels . Free Food Table Photos - Pexels
Avoid downloading files/directories from untrusted FTP servers. "/>
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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