[Freeipa-users] SUDO and group lookup in AD trust

Thu Aug 25 07:24:34 UTC 2016

Hmm, sometimes the man page actually helps....

It seems setting "default_domain_suffix" to allow users to log in, without the domain part changes use_fully_qualified_names default to true, without the option of setting it false.....

So, we have two options:
- Have users always use their full login including domain
- Setting default_domain_suffix to help the users and efficiently break SUDO?

Can this be true?

----- On Aug 25, 2016, at 8:42 AM, Troels Hansen th at casalogic.dk wrote:

> Yes and no....
> 
> Have tried setting it to both true and false, but doesn't make a huge
> difference.
> 
> Current result with "use_fully_qualified_names = false"
> 
> LDAP search from sssd_sudo.log shows SSSD finding a sudo rule...
> 
> (Thu Aug 25 08:15:27 2016) [sssd[sudo]] [sudosrv_get_sudorules_query_cache]
> (0x0200): Searching sysdb with
> [(&(objectClass=sudoRule)(|(sudoUser=ALL)(sudoUser=drextrha at net.dr.dk)(sudoUser=#1349938498)
> .......
> (sudoUser=%domain_users)(sudoUser=+*)))]
> (Thu Aug 25 08:15:27 2016) [sssd[sudo]] [sort_sudo_rules] (0x0400): Sorting
> rules with higher-wins logic
> (Thu Aug 25 08:15:27 2016) [sssd[sudo]] [sudosrv_get_sudorules_from_cache]
> (0x0400): Returning 1 rules for [drextrha at net.dr.dk]
> 
> SSSD cache shows the sudo rule:
> 
> # ldbsearch -H /var/lib/sss/db/cache_linux.dr.dk.ldb -b cn=sysdb
> '(objectClass=sudoRule)'
> asq: Unable to register control with rootdse!
> # record 1
> dn: name=guffe,cn=sudorules,cn=custom,cn=linux.dr.dk,cn=sysdb
> cn: guffe
> dataExpireTimestamp: 1472110940
> entryUSN: 325878
> name: guffe
> objectClass: sudoRule
> originalDN: cn=guffe,ou=sudoers,dc=linux,dc=dr,dc=dk
> sudoCommand: /usr/bin/cat /var/log/messages
> sudoHost: ALL
> sudoRunAsGroup: ALL
> sudoRunAsUser: ALL
> sudoUser: %domain_users
> distinguishedName: name=guffe,cn=sudorules,cn=custom,cn=linux.dr.dk,cn=sysdb
> 
> But still sudo debug log says:
> 
> Aug 25 08:29:55 sudo[2392] -> user_in_group @ ./pwutil.c:940
> Aug 25 08:29:55 sudo[2392] -> sudo_get_grlist @ ./pwutil.c:877
> Aug 25 08:29:55 sudo[2392] -> rbfind @ ./redblack.c:273
> Aug 25 08:29:55 sudo[2392] <- rbfind @ ./redblack.c:277 := 0x7f877f45d1d0
> Aug 25 08:29:55 sudo[2392] <- sudo_get_grlist @ ./pwutil.c:930 := 0x7f877f45d348
> Aug 25 08:29:55 sudo[2392] -> sudo_getgrnam @ ./pwutil.c:719
> Aug 25 08:29:55 sudo[2392] -> rbfind @ ./redblack.c:273
> Aug 25 08:29:55 sudo[2392] <- rbfind @ ./redblack.c:280 := (nil)
> Aug 25 08:29:55 sudo[2392] -> make_gritem @ ./pwutil.c:474
> Aug 25 08:29:55 sudo[2392] <- make_gritem @ ./pwutil.c:524 := 0x7f877f44ef20
> Aug 25 08:29:55 sudo[2392] -> rbinsert @ ./redblack.c:181
> Aug 25 08:29:55 sudo[2392] <- rbinsert @ ./redblack.c:261 := (nil)
> Aug 25 08:29:55 sudo[2392] <- sudo_getgrnam @ ./pwutil.c:745 := 0x7f877f44ef38
> Aug 25 08:29:55 sudo[2392] -> sudo_grlist_delref @ ./pwutil.c:816
> Aug 25 08:29:55 sudo[2392] -> sudo_grlist_delref_item @ ./pwutil.c:805
> Aug 25 08:29:55 sudo[2392] <- sudo_grlist_delref_item @ ./pwutil.c:810
> Aug 25 08:29:55 sudo[2392] <- sudo_grlist_delref @ ./pwutil.c:818
> Aug 25 08:29:55 sudo[2392] <- user_in_group @ ./pwutil.c:1010 := false
> 
> 
> I'm quite lost on how to debug further on this.....
> 
> ----- On Aug 24, 2016, at 9:50 AM, Jakub Hrozek jhrozek at redhat.com wrote:
> 
>> On Tue, Aug 23, 2016 at 03:17:48PM +0200, Troels Hansen wrote:
>>> Running RHEL 7.2:
>>> 
>>> ipa-client-4.2.0-15.el7_2.18
>>> sssd-ipa-1.13.0-40.el7_2.12.x86_64
>>> ipa-server-4.2.0-15.el7_2.18.x86_64
>>> 
>>> I have a sudo rule where I try to give sudo access based on a AD group.
>>> 
>>> # groups drextrha at net.dr.dk
>>> drextrha at net.dr.dk : drextrha at net.dr.dk ............... domain_users at linux.dr.dk
>>> 
>>> I'm member of the group domain_users via AD.
>>> 
>>> SUDO rule in LDAP:
>>> 
>>> # guffe, sudoers, linux.dr.dk
>>> dn: cn=guffe,ou=sudoers,dc=linux,dc=dr,dc=dk
>>> sudoUser: %domain_users
>>> sudoRunAsGroup: ALL
>>> objectClass: sudoRole
>>> objectClass: top
>>> sudoCommand: /usr/bin/cat /var/log/messages
>>> sudoRunAsUser: ALL
>>> sudoHost: ALL
>>> cn: guffe
>> 
>> domain_users != domain_users at linux.dr.dk
>> 
>> I'm also curious why sssd qualifies the IPA group name (domain_users is
>> an IPA group name right?)
>> 
>> do you set use_fully_qualified_names=true by chance in the config file?
>> 
>> --
>> Manage your subscription for the Freeipa-users mailing list:
>> https://www.redhat.com/mailman/listinfo/freeipa-users
>> Go to http://freeipa.org for more info on the project
> 
> --
> Med venlig hilsen
> 
> Troels Hansen
> 
> Systemkonsulent
> 
> Casalogic A/S
> 
> 
> T (+45) 70 20 10 63
> 
> M (+45) 22 43 71 57
> 
> Red Hat, SUSE, VMware, Citrix, Novell, Yellowfin BI, EnterpriseDB, Sophos og
> meget mere.
> 
> --
> Manage your subscription for the Freeipa-users mailing list:
> https://www.redhat.com/mailman/listinfo/freeipa-users
> Go to http://freeipa.org for more info on the project

-- 
Med venlig hilsen 

Troels Hansen 

Systemkonsulent 

Casalogic A/S 

T (+45) 70 20 10 63 

M (+45) 22 43 71 57 

Red Hat, SUSE, VMware, Citrix, Novell, Yellowfin BI, EnterpriseDB, Sophos og meget mere.