[sudo-users] Sudo keeps using the same binary although PATH is different when invoking with sudo.

[Piotr Dobrogost]

Todd C. Miller <Todd.Miller <at> courtesan.com> writes:

> The env command is useful for this.  E.g.
> 
> $ sudo env | grep PATH
> 
> That will show you the PATH sudo has set without a shell in the way.

Right, recalled env after posting, too :)

[user at localhost ~]$ env | grep PATH
PATH=/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/user/bin
[user at localhost ~]$ sudo env | grep PATH
PATH=/usr/bin:/bin

> Based on that output I would not expect sudo to modify the PATH.

Yet it seems it does modify PATH as seen in the output from `env` above.
Any ideas? Is it possible that this version of sudo was compiled with
secure_path but information about this is missig both in the output of sudo
-l and sudo -V? Below is the output of sudo sudo -V:

[user at localhost ~]$ sudo sudo -V
Sudo version 1.7.2p1

Sudoers path: /etc/sudoers
nsswitch path: /etc/nsswitch.conf
ldap.conf path: /etc/ldap.conf
ldap.secret path: /etc/ldap.secret
Authentication methods: 'pam'
Syslog facility if syslog is being used for logging: authpriv
Syslog priority to use when user authenticates successfully: notice
Syslog priority to use when user authenticates unsuccessfully: alert
Ignore '.' in $PATH
Send mail if the user is not in sudoers
Use a separate timestamp for each user/tty combo
Lecture user the first time they run sudo
Require users to authenticate by default
Root may run sudo
Allow some information gathering to give useful error messages
Visudo will honor the EDITOR environment variable
Set the LOGNAME and USER environment variables
Length at which to wrap log file lines (0 for no wrap): 80
Authentication timestamp timeout: 5 minutes
Password prompt timeout: 5 minutes
Number of tries to enter a password: 3
Umask to use or 0777 to use user's: 022
Path to mail program: /usr/sbin/sendmail
Flags for mail program: -t
Address to send mail to: root
Subject line for mail messages: *** SECURITY information for %h ***
Incorrect password message: Sorry, try again.
Path to authentication timestamp dir: /var/run/sudo
Default password prompt: [sudo] password for %p: 
Default user to run commands as: root
Path to the editor for use by visudo: /bin/vi
When to require a password for 'list' pseudocommand: any
When to require a password for 'verify' pseudocommand: all
File containing dummy exec functions: /usr/libexec/sudo_noexec.so
File descriptors >= 3 will be closed before executing a command
Reset the environment to a default set of variables
Environment variables to check for sanity:
        TERM
        LINGUAS
        LC_*
        LANGUAGE
        LANG
        COLORTERM
Environment variables to remove:
        RUBYOPT
        RUBYLIB
        PYTHONINSPECT
        PYTHONPATH
        PYTHONHOME
        TMPPREFIX
        ZDOTDIR
        READNULLCMD
        NULLCMD
        FPATH
        PERL5DB
        PERL5OPT
        PERL5LIB
        PERLLIB
        PERLIO_DEBUG 
        JAVA_TOOL_OPTIONS
        SHELLOPTS
        GLOBIGNORE
        PS4
        BASH_ENV
        ENV
        TERMCAP
        TERMPATH
        TERMINFO_DIRS
        TERMINFO
        _RLD*
        LD_*
        PATH_LOCALE
        NLSPATH
        HOSTALIASES
        RES_OPTIONS
        LOCALDOMAIN
        CDPATH
        IFS
Environment variables to preserve:
        XAUTHORIZATION
        XAUTHORITY
        TZ
        PS2
        PS1
        PATH
        MAIL
        LS_COLORS
        KRB5CCNAME
        HOSTNAME
        HOME
        DISPLAY
        COLORS
Locale to use while parsing sudoers: C
Local IP address and netmask pairs:
        10.0.2.15 / 255.255.255.0
        fe80::a00:27ff:febb:56ce / ffff:ffff:ffff:ffff::


Regards,
Piotr