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Bug 1404697 - SSSD does not skip GPO if no gpcFunctionalityVersion present
Summary: SSSD does not skip GPO if no gpcFunctionalityVersion present
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: sssd
Version: 6.8
Hardware: All
OS: Linux
high
high
Target Milestone: rc
: 6.8
Assignee: Michal Zidek
QA Contact: Steeve Goveas
URL:
Whiteboard:
Depends On:
Blocks: 1404725
TreeView+ depends on / blocked
 
Reported: 2016-12-14 12:57 UTC by Andrey Bondarenko
Modified: 2020-05-02 18:35 UTC (History)
9 users (show)

Fixed In Version: sssd-1.13.3-56.el6
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1404725 (view as bug list)
Environment:
Last Closed: 2017-03-21 09:58:43 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github SSSD sssd issues 4302 0 None closed SSSD does not skip GPO if no gpcFunctionalityVersion present 2021-01-28 12:50:48 UTC
Red Hat Product Errata RHBA-2017:0632 0 normal SHIPPED_LIVE sssd bug fix and enhancement update 2017-03-21 12:30:13 UTC

Description Andrey Bondarenko 2016-12-14 12:57:15 UTC 
Description of problem:

If the  groupPolicyContainer created by some tool (for example the https://www.quest.com/products/password-manager/) does not conatin gpcFunctionalityVersion attribute and sssd stumbles upon such container, it stops the processing and just quit with the default decision (wich is usually deny).

To avoid this problem, the SSSD should skip any GPO that does not contain the gpcFunctionalityVersion because this is the behavior specified by the MS-GPOL, see 3.2.5.1.6:

-----
3.2.5.1.6 GPO Filter Evaluation
In this step, the client MUST process the GPO as follows:
 1. Check for the functionality version of the GPO. If the gPCFunctionalityVersion
    field of the Group Policy Object Search message (as defined in [MS-ADA1]
    section 2.278) is not set to 2, the GPO MUST NOT be included in the rest
    of the protocol sequence. The GPO MUST be considered denied.
-----

given that the GPO itself does not have access control rules, you filter
it out. 


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

sssd-1.14.0-43.el7.x86_64                


Steps to Reproduce:
1. create GPO with https://www.quest.com/products/password-manager/
2. try to log in with such user 

Actual results:

login fails

Expected results:


should log in
Comment 1 Andrey Bondarenko 2016-12-14 13:48:48 UTC 
Correct versions for the 6.8 related bug:

sssd-1.13.3-22.el6_8.4.x86_64                               Sun Oct 30 11:19:34 2016
sssd-ad-1.13.3-22.el6_8.4.x86_64                            Sun Oct 30 11:19:32 2016
sssd-client-1.13.3-22.el6_8.4.x86_64                        Sun Oct 30 11:19:30 2016
sssd-common-1.13.3-22.el6_8.4.x86_64                        Sun Oct 30 11:19:31 2016
Comment 4 Jakub Hrozek 2016-12-15 15:24:55 UTC 
Upstream ticket:
https://fedorahosted.org/sssd/ticket/3269
Comment 8 Lukas Slebodnik 2017-01-26 13:43:48 UTC 
master:
* 47680083e7e4bf5c433657171bf84cceacc83339
* 6a490b312075d2588ad87bbb8a63466f1ac6a106

sssd-1-14:
* 9bf6c4b5afb5054282f7b8c4c5f7bed26a259f5a
* 94903da8a3723094948b4b99b30f6449fed809da

sssd-1-13:
* 627edf70ab2571d504bc23fdf3b15ce7983d4388
* 0ee20e9ece0d24c335f604b20e1ba7c8ea1d669d
Comment 11 Dan Lavu 2017-02-16 01:28:43 UTC 
Manually verified against sssd-1.13.3-56.el6.x86_64

Added a denied user, and the user properly denied. 

ssh user1.176.119
user1.176.119's password: 
Connection closed by UNKNOWN

(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400): CURRENT USER:
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400):        user_sid = S-1-5-21-343696347-2574225464-2087024737-1109
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400):   group_sids[0] = S-1-5-21-343696347-2574225464-2087024737-513
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400):   group_sids[1] = S-1-5-11
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400): POLICY DECISION:
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400):  access_granted = 1
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_check] (0x0400):   access_denied = 1
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_perform_hbac_processing] (0x0040): GPO access check failed: [1432158228](Host Access Denied)
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_cse_done] (0x0040): HBAC processing failed: [1432158228](Host Access Denied}
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [ad_gpo_access_done] (0x0040): GPO-based access control failed.
(Wed Feb 15 20:26:08 2017) [sssd[be[shrd.org]]] [be_pam_handler_callback] (0x0100): Backend returned: (0, 6, <NULL>) [Success]
Comment 13 errata-xmlrpc 2017-03-21 09:58:43 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0632.html
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