1.7 KiB
echoCTF - Anvil
This is an OS category challenge in which we are provided an IP address and a port to conenct using nc
We can find the first flag by printing the evnironmental variables using env
Privilege Escalation (silver)
Running sudo -l we can see that we are user copper and we can run /sbin/debugfs as silver user
In this user's directory we can find the first flag
Privilege Escalation (gold)
Next we can again run sudo -l to see which commands we can run as other user and here we can run /usr/bin/sftp with gold user , now in order to escalate we need to have a ssh port running but here we can't open that port as we need root privileges so we can open ssh port on our host machine
Following GTFOBINS we can spawn a bash shell
And in gold's home directory we can get the second flag.
Privilege Escalation (ETSCTF)
Doing sudo -l again we can see that this user can run /bin/bzless as ETSCTF user
bzless is similar to less binary but it's for viewing bzip2 compressed text so we can try to pass a filename to it and then privesc similar to less
