sudo -K/-k ineffective

Lowell Gilbert freebsd-questions-local at
Sun Aug 1 17:46:02 UTC 2010

me <gurpreet007 at> writes:

> Hi,
> Upon doing sudo <some-command> as a normal user (non-root), sudo asks for
> password only once, subsequent invocations of sudo doesn't ask for password
> - even though I do sudo -k or sudo -K in between.
> Although sudo starts asking for password after the time stamp expiry.
> in other words:
> % sudo mkdir /newdir
> <sudo asks for password authentication, creates the directory after
> successful authentication>
> % sudo -k
> % sudo -K
> % sudo mkdir /another_new_dir
> <sudo don't ask for password authentication, and creates the directory>
> In sudoers file, NOPASSWD is NOT set.
> here is my sudeors file:
> Output of "uname -a":
> FreeBSD 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:55:53 UTC
> 2010
> root at i386
> Is this known bug? If not, then it might have security implications.

It certainly might, for anyone using the -[kK] options.

However, I can't reproduce it.  Works as advertised when I try your
example.  The only settings in my sudoers file are 
(for my own account only).

And your sudoers file seems to be factory standard.  

I don't think sudo even knows about pam(3), so I'm not sure what could
be happening here...

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