Description of problem:

The sudo version(s) on RHEL 4 does not properly recognize network addresses
for specifying a host.

Version-Release number of selected component (if applicable):

version 1.6.7p5 release 30.1.1
version 1.6.7p5 release 30.1.3

How reproducible:

100% of the time

Steps to Reproduce:

Test with sudoers config of just single line:

<username>     <network address> = ALL

Actual results:

<user> is not allowed to run sudo on <host>

Expected results:

user should be allowed

Additional info:

I have been using several sudoers configs for some time now on all types
of unix hosts in our environment.  However, when I tried making it more
granular, I found that it does not work properly on RHEL 4.0 systems
with the default Red Hat sudo implementation.

I have stripped the sudoers config down to just the basics for troubleshooting:
(actual subnet addresses/hostname/username not listed to protect the guilty...)

        Host_Alias      MYHOSTS = <subnet>/24

        User_Alias      ADMINS = myadmin

        ADMINS          MYHOSTS = ALL

And finally its simplest form:

        myadmin        <subnet>/24 = ALL

It always fails to allow sudo access:

        myadmin is not allowed to run sudo on <host>...

I have tried all variations on the network address with no luck, for example:

        192.168.1.93
        192.168.1.0
        192.168.1.0/24
        192.168.1.0/255.255.255.0

However, if I specify the hostname it works fine:

        myadmin        myhost = ALL

As does the default config of:

        myadmin        ALL = ALL

I have tested this on RHEL 4.0, RHEL 4.0U1, and also an updated
RHEL 4.0 box that was fully updated as of today via up2date.

        Linux myhost 2.6.9-11.ELsmp #1 SMP Fri May 20 18:26:27 EDT 2005 i686
i686 i386 GNU/Linux
        sudo version 1.6.7p5 release 30.1.1 and release 30.1.3

        Linux myhost 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:32:14 EDT 2005 i686
i686 i386 GNU/Linux
        sudo version 1.6.7p5 release 30.1.1 and release 30.1.3

I then downloaded the latest sudo source from courtesan and did a
default compile and install of it on my system, and it works fine on RHEL 4:

        Linux myhost 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:32:14 EDT 2005 i686
i686 i386 GNU/Linux
        Sudo version 1.6.8p9

It also works fine on RHEL 3.x, as well as lots of other OSes/sudo combinations:

        RHEL WS 3.0 Kernel 2.4.21-9.0.1.ELsmp - sudo version 1.6.7p5 release 1.2
        RHEL WS 3.0U4 Kernel 2.4.21-27.ELsmp - sudo 1.6.7p5 release 1
        HP-UX B.11.11 - Sudo version 1.6.8p1
        IRIX64 6.5.25m - Sudo version 1.6.6
        Solaris 8 - Sudo version 1.6.8p9
        Solaris 9 - Sudo version 1.6.8p9

So it appears to be a problem specific to the RHEL 4 implementation of sudo.