<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=UTF-8" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> Michael Schwendt wrote: <blockquote cite="mid20081119102701.5ec9b18a.mschwendt@gmail.com" type="cite"> <pre wrap="">On Wed, 19 Nov 2008 17:17:40 +0800, <a class="moz-txt-link-abbreviated" href="mailto:edwardspl@ita.org.mo">edwardspl@ita.org.mo</a> wrote:</pre> <blockquote type="cite"> <pre wrap="">Michael Schwendt wrote:</pre> <blockquote type="cite"> <pre wrap="">n Tue, 18 Nov 2008 08:36:56 -0800, Gordon Messmer wrote:</pre> <blockquote type="cite"> <pre wrap="">asswd-wrapper: #!/bin/sh # Validate that a username was given as an argument [ -n "$1" ] || { echo "Use: passwd-wrapper <username>" >&2 exit 64 } # Validate that the username wasn't "root" [ "$1" != "root" ] || { echo "Can't set the root user's password" >&2 exit 77 } # Use -- to make sure that the "username" given wasn't just # a switch that passwd would interpret. # THIS ONLY WORKS ON GNU SYSTEMS. passwd -- "$1"</pre> </blockquote> <pre wrap="">Don't let users run this via sudo unless you execute tools with absolute path --> /usr/bin/passwd </pre> </blockquote> <pre wrap="">Hello, Do you means there is some problem / security with this shell scripts ? </pre> </blockquote> <pre wrap="">It depends on your sudo/sudoers configuration. You can read more about it in the manuals. Look out for setenv, env_, SECURE_PATH (and related settings). </pre> </blockquote> Just the following rules : SYSADM MH = (ALL) /usr/bin/passwd-wrapper <blockquote cite="mid20081119102701.5ec9b18a.mschwendt@gmail.com" type="cite"> <blockquote type="cite"><>BUT, only some of special user who can running some of cmd via sudo... eg: System Admin ( manager ) and Support Term... </></blockquote> </blockquote> <blockquote cite="mid20081119102701.5ec9b18a.mschwendt@gmail.com" type="cite"> <blockquote type="cite"><>It's general advise not to open an attack vector via $PATH when trying to impose restrictions on what those special users may run. Today your sudo configuration may not permit that, but you wouldn't be the first one to switch from sudo to setuid or to alter your sudo config in harmful ways.</></blockquote> </blockquote> I think the system admin config the sudo only for some special user ( eg: system support term ) for the Server Maintance... So, NOT many user he/she can running with sudo, right ? Thanks ! Edward. </body> </html>