| 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. Nakia: Ty: Holding a specific "standard" and "sound" on her life that dictates how she carries herself and interacts with the world. Beyond her writing, she maintains a presence in the creative arts, with credits on The Movie Database (TMDB) and an IMDb profile that reflects her involvement in the industry. She often uses her platform to share "Raized Conversations," deep-diving into topics of spiritual building and legacy. Nakia Ty - Biography - IMDb nakia ty Her philosophy is deeply rooted in the idea that her identity was formed, not just raised. She often speaks about: : Holding a specific "standard" and "sound" on : Overcoming a lack of initial resources to achieve milestones like becoming a published author. Creative and Literary Work Nakia Ty - Biography - IMDb Her philosophy Nakia Ty is recognized for her role as a soon-to-be-published author, particularly on platforms like KDP. Her writing style blends:
Avoid downloading files/directories from untrusted FTP servers.
Disclosure Timeline
2008-06-15 - Vulnerability Discovered. |
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