Tan Chew Keong has reported a vulnerability in ALFTP FTP Client, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an input validation error when downloading directories containing files with directory traversal specifiers in the filename. This can be exploited to download files to an arbitrary location on a user's system.
Successful exploitation requires that the user is tricked into connecting and downloading a directory from a malicious FTP server.
The vulnerability is reported in version version 4.1 beta 2 (English) and 5.0 (Korean). Other versions may also be affected.
Solution: Do not download directories from untrusted FTP servers.
Provided and/or discovered by: Tan Chew Keong
Original Advisory: http://vuln.sg/alftp41b2-en.html
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