Cat Soft Serv-U FTP Server 2.5/a/b (Windows 95/98/2000/NT 4.0) - Shortcut

Author: Ussr Labs
type: remote
platform: windows
port: 
date_added: 2000-02-04 
date_updated: 2016-09-27 
verified: 1 
codes: CVE-2000-0129;OSVDB-13631 
tags: 
aliases:  
screenshot_url:  
application_url: 

Cat Soft Serv-U 2.5/a/b,Windows 2000 Advanced Server/2000 Datacenter Server/2000 Professional/2000 Server/2000 Terminal Services/95/98/NT 4.0/NT Enterprise Server 4.0/NT Server 4.0/NT Terminal Server 4.0/NT Workstation 4.0 Shortcut Vulnerability

source: https://www.securityfocus.com/bid/970/info

The Windows API that handles shortcut navigation is susceptible to buffer overflow attacks. The API, "SHGetPathFromIDList" will parse a shortcut file (.lnk) to find the target file, directory or URL. A specifically malformed link will cause any program using the API to follow that shortcut to crash.

NOTE: While this vulnerability listing, as well as the exploit and the original USSR advisory only mention Serv-U FTP server, any Windows, Microsoft, or 3rd party program that uses the API could be vulnerable to this.

dserv2.5b.exe:
Executable exploit for Serv-U FTP server

dserv25b.zip:
Source code for above exploit

link.bro:
Example of a malformed shortcut file.

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19743-1.zip

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19743-2.exe

https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19743-3.bro