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by onraglanroad 96 days ago
No, I'm right. You can't run unix_chkpwd against a local account without root because you won't be able to access /etc/shadow to get the hash. If you think you can, explain how. Otherwise you have to use the setuid version which won't let you run it directly.

And I just removed the delay using my method. Perhaps try checking something yourself?
1 comments
timhh 96 days ago
I don't understand how you can be so confidently wrong about something so easily checked. :D

> You can't run unix_chkpwd against a local account without root because you won't be able to access /etc/shadow to get the hash.

unix_chkpwd can access /etc/shadow because it is suid.

> Otherwise you have to use the setuid version which won't let you run it directly.

Haha you mean this?

  $ unix_chkpwd
  This binary is not designed for running in this way
  -- the system administrator has been informed
Take a look at the source code I linked about 6 comments ago!

> Perhaps try checking something yourself?

I have. You haven't.

  printf 'hunter2\0' | unix_chkpwd yourusername nullok; echo $?
link