Directory Traversal Vulnerability in 32bit FTP Client
- From: advisory@xxxxxxxxxxx
- Date: Mon, 2 Aug 2010 12:19:22 +0200 (CEST)
Vulnerability ID: HTB22512
Product: 32bit FTP Client
Vendor: ElectraSoft ( http://www.electrasoft.com/32ftp.htm )
Vulnerable Version: 10.07.09 and Probably Prior Versions
Vendor Notification: 19 July 2010
Vulnerability Type: Directory Traversal Vulnerability
Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response
Risk level: High
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)
When exploited, this vulnerability allows an anonymous attacker to write files to specified locations on a user's system.
The FTP client does not properly sanitise filenames containing directory traversal sequences that are received from an FTP server, for example
file named as "..\..\..\..\..\..\..\somefile.exe".
By tricking a user to download a directory from a malicious FTP server that contains files with backslash directory traversal sequences in their filenames,
an attacker can potentially write files into a user's Startup folder to execute malicious code when the user logs on.
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