Uh oh I chmod -R 777 /

ssh won’t let me in, i can’t su or sudo from console. I’ve logged in as a regular user.

1. JOB: Get root
   METHOD: Check for available cron.d tasks
   
username@chief:~$ ls -la /etc/cron.d
total 32
drwxrwxrwx 3 root root 4096 2010-05-24 04:17 .
drwxrwxrwx 102 root root 8192 2010-05-24 04:55 ..
-rwxrwxrwx 1 root root 456 2010-05-24 04:17 php4


   Oh good.

   Add a line into php4 cron job – it runs once a minute, copies a shell to tmp and makes it executable. Don’t forget to disable the job and remove the shell when you’re finished.

   username@chief:~$ cat /etc/cron.d/php4 | grep sh
*/1 * * * * root cp /bin/sh /tmp/sh; chmod 4755 /tmp/sh


   enter that shell
username@chief:/root$ cd
username@chief:~$ /tmp/sh
sh-3.1# whoami
root


2. fix some things and tidy up
   chief:~# chmod 0600 /var/run/sshd /etc/ssh/ssh_host_*
   chief:~# chmod 4755 /bin/su /usr/bin/sudo
   chief:~# chmod 0440 /etc/sudoers
   chief:~# chmod 0700 /var/run/sudo/
   chief:~# /etc/init.d/ssh start
   chief:~# rm /tmp/sh

3. fix apt-get
   chief:~# apt-get install [anypackage]
   Reading package lists... Done
   Building dependency tree... Done
   You might want to run ‘apt-get -f install’ to correct these:
   The following packages have unmet dependencies.
   libavcodec52: Depends: libavutil49 (>= 4:0.5+svn20090706) but it is not going to be installed or
   libavutil-extra-49 (>= 4:0.5+svn20090706) but it is not installablechief:~# dpkg -l | grep libavutilcvs49

   chief:~# dpkg -r ffmpeg
chief:~# dpkg -r libavcodeccvs51
chief:~# dpkg -r libavutilcvs49
chief:~# apt-get -f install