[sudo-users] Problem with Sudo-LDAP

Jayson Henkel jhenkel at sterlingcrane.com
Thu Mar 23 11:13:05 EST 2006


Huibert,

Indeed that is where I've focused my attentions on. It doesn't seem like
it does modify the behaviour.

Please see the following when I've made the change from uri: ldaps:// to
ldap://localhost:


However as I've mentioned before with an ldapsearch -x -ZZ -h
ldap.sterlingcrane.ca 
and with an ldapsearch -x -H ldaps://ldap.sterlingcrane.ca they both
return searches properly.
However, now that you mention it, I suspect it might be because of the
TLS_CACERT option. I wonder if perhaps sudo-ldap doesn't yet accept the
TLS_CACERT directive?


LDAP Config Summary
===================
uri          ldap://localhost
ldap_version 3
sudoers_base ou=sudoers,ou=roles,dc=sterlingcrane,dc=ca
binddn       (anonymous)
bindpw       (anonymous)
ssl          (no)
===================
ldap_initialize(ld,ldap://localhost)
ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,0x03)
ldap_bind() ok
found:cn=defaults,ou=sudoers,ou=roles,dc=sterlingcrane,dc=ca
ldap search '(|(sudoUser=root)(sudoUser=%root)(sudoUser=%
root)(sudoUser=ALL))'
found:cn=root,ou=sudoers,ou=roles,dc=sterlingcrane,dc=ca
ldap sudoHost 'ALL' ... MATCH!
ldap sudoCommand '(ALL) ALL' ... not
ldap search 'sudoUser=+*'
user_matches=-1
host_matches=-1
sudo_ldap_check(0)=0x04
ruto:~# d
ruto:~# logout
ruto:~# logout
jhenkel at ruto:/usr/share/doc/sudo-ldap$ sudo su -
sudo: uid 1039 does not exist in the passwd file!
jhenkel at ruto:/usr/share/doc/sudo-ldap$ sendmail: fatal: no login name
found for user ID 1039

On Thu, 2006-23-03 at 17:03 +0100, Huibert.Kivits at mail.ing.nl wrote:
> Hi Jayson,
> 
> In the LDAP Config Summary, it says:
> ssl	(no)
> Whereas later, you mention that LDAPS is used.
> That sounds a bit like a contradiction.
> 
> Is SSL/LDAPS used succesfully if a user logs into these systems? If that's the case, encryption should work.
> 
> You might consider turning off SSL for SUDO traffic. It's nice, but AFAIK, only the LDAP client connection sends passwords, not the SUDO client connection.
> 
> At my company, SSL is used for encrypting the LDAP client connection (for user authentication), not for the sudo connection.
> 
> BTW: do not exclude the possibility that it's just a bug in your software. On Solaris 8 for example, it took numerous updates and fixes before the LDAP client finally supported SSL correctly. You may want to check with your supplier, if you're sure there's no mistake in your configuration.
> 
> Met vriendelijke groeten / With kind regards / Mit freundlichen Grüßen / Med vänliga hälsningar / nuosirdziausi linkejimai,
> 
> 
> Huibert Kivits
> ING
> 
> "...all too often, when organizations develop information security programs, they treat security issues as a simple 'check-box' on the list of required corporate functions."
> Richard Forno & Kenneth R van Wyk, "Incident Response", O'Reilly, 2001, ISBN: 0-596-00130-4
> 
> 
> 
> -----Oorspronkelijk bericht-----
> Van: sudo-users-bounces at courtesan.com [mailto:sudo-users-bounces at courtesan.com] Namens Jayson Henkel
> Verzonden: dinsdag 21 maart 2006 17:15
> Aan: sudo-users at sudo.ws
> Onderwerp: [sudo-users] Problem with Sudo-LDAP
> 
> 
> 
>         I'm currently
>         trying to implement the sudo-ldap modification to sudo. This
>         will be a
>         big benefit to myself. However, I am having some difficulties
>         implementing it.
>         
>         I have turned debugging on and get the following information
>         when I run
>         sudo from root:
>         
>         LDAP Config Summary
>         ===================
>         uri          ldaps://ldap.sterlingcrane.ca
>         ldaps://ldap2.sterlingcrane.ca
>         ldap_version 3
>         sudoers_base ou=sudoers,ou=roles,dc=sterlingcrane,dc=ca
>         binddn       (anonymous)
>         bindpw       (anonymous)
>         ssl          (no)
>         ===================
>         ldap_initialize(ld,ldaps://ldap.sterlingcrane.ca
>         ldaps://ldap2.sterlingcrane.ca)
>         ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,0x03)
>         ldap_simple_bind_s()=81 : Can't contact LDAP server
>         usage: sudo -K | -L | -V | -h | -k | -l | -v
>         usage: sudo [-HPSb] [-p prompt] [-u username|#uid]
>                     { -e file [...] | -i | -s | <command> }
>         
>         
>         
>         When I run it from a normal user I receive the following.
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$ sudo passwd foo
>         sudo: uid 1039 does not exist in the passwd file!
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$ sendmail: fatal: no login
>         name
>         found for user ID 1039
>         
>         
>         
>         However, please review the following:
>         
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$ getent passwd 1039
>         jhenkel:x:1039:1000:Jayson Henkel:/home/jhenkel:/bin/bash
>         
>         Keep in mind, all my user information is in ldap and no files
>         are local,
>         therefor ldap is working. See below for examples of both TLS and
>         LDAPS
>         
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$ ldapsearch -x -ZZ  -h
>         ldap.sterlingcrane.ca uid=jhenkel dn
>         # extended LDIF
>         #
>         # LDAPv3
>         # base <> with scope sub
>         # filter: uid=jhenkel
>         # requesting: dn
>         #
>         
>         # jhenkel, staff, people, sterlingcrane.ca
>         dn: uid=jhenkel,ou=staff,ou=people,dc=sterlingcrane,dc=ca
>         
>         # search result
>         search: 3
>         result: 0 Success
>         
>         # numResponses: 2
>         # numEntries: 1
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$ ldapsearch -x -H
>         ldaps://ldap.sterlingcrane.ca uid=jhenkel dn
>         # extended LDIF
>         #
>         # LDAPv3
>         # base <> with scope sub
>         # filter: uid=jhenkel
>         # requesting: dn
>         #
>         
>         # jhenkel, staff, people, sterlingcrane.ca
>         dn: uid=jhenkel,ou=staff,ou=people,dc=sterlingcrane,dc=ca
>         
>         # search result
>         search: 2
>         result: 0 Success
>         
>         # numResponses: 2
>         # numEntries: 1
>         jhenkel at ruto:/usr/share/doc/sudo-ldap$
>         
>         
>         When I sniff traffic on the ldap interface, I can clearly see
>         that when
>         I type sudo that ldap traffic is generated on the ldaps (636)
>         port.
>         
>         
>         Here's my ldap.conf too in case it helps.
>         
>         
>         
>         BASE    dc=sterlingcrane,dc=ca
>         URI     ldaps://ldap.sterlingcrane.ca
>         ldaps://ldap2.sterlingcrane.ca
>         #URI    ldap://localhost
>         TLS_CACERT /etc/ssl/certs/CA.crt
>         #TLS_REQCERT allow
>         
>         #SIZELIMIT      12
>         #TIMELIMIT      15
>         #DEREF          never
>         
>         #SUDO Control
>         sudoers_base   ou=sudoers,ou=roles,dc=sterlingcrane,dc=ca
>         sudoers_debug 2
>         
>         
>         
>         
>         Can you offer any advice on how to resolve this?
>         Thanks in advance..
-- 
Regards,

Jayson D. Henkel
Systems Manager

(Tel:  +1 (780) 440-4434)
(Fax:  +1 (780) 440-1951)
(Cell: +1 (780) 886-8941)
(E-Mail: jhenkel at sterlingcrane.com)

Sterling Crane
P.O. Box 8610. Station South
Edmonton, Alberta
Canada. T6E 6R2

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