[763335 views]

[]

[toggle ads]

Odi's astoundingly incomplete notes

New entries | Code

another broken sudo

$ sudo -l
[sudo] password for xxx: 
Matching Defaults entries for xxx on this host:
    requiretty, !visiblepw, always_set_home, env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR
    LS_COLORS", env_keep+="MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE", env_keep+="LC_COLLATE LC_IDENTIFICATION
    LC_MEASUREMENT LC_MESSAGES", env_keep+="LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE", env_keep+="LC_TIME
    LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY", secure_path=/sbin\:/bin\:/usr/sbin\:/usr/bin,
    logfile=/var/log/sudolog

User xxx may run the following commands on this host:
    (ALL) ALL, (ALL) /usr/bin/passwd [a-zA-Z0-9_-]*, !/usr/bin/passwd root, (ALL) !/sbin/su*, !/bin/su, !/bin/bash root,
    !/bin/sh root, (ALL) !/usr/sbin/visudo, (ALL) !sudoedit /etc/sudoers, (ALL) !/usr/bin/* /etc/sudoers, !/bin/*
    /etc/sudoers, /opt/* /etc/sudoers, (ALL) !/usr/bin/* /etc/shadow, !/bin/* /etc/shadow, !/opt/* /etc/shadow
$ sudo bash
# whoami
root
Look how they wanted to restrict executing bash. And look how they wanted to restrict access to sudoers. All that AFTER giving me ALL(ALL). Again, sudo is a complete failure.

It's always a really stupid idea to first hand out permission to everything and then trying to backpedal and go all like: uh oh... but not that... and this... and not that either... and... ah clever me... You are not going to find all possibilities. Ever.

posted on 2016-09-28 16:00 CEST in Code | 0 comments | permalink