Bug 1431000 – Winbind core dumps when attempting to login as a disabled user in AD

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Bug 1431000 - Winbind core dumps when attempting to login as a disabled user in AD [NEEDINFO]

Summary:	Winbind core dumps when attempting to login as a disabled user in AD

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	samba (Show other bugs)
Sub Component:
Version:	6.8
Hardware:	x86_64 Linux

Priority	medium Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Andreas Schneider
QA Contact:	qe-baseos-daemons
Docs Contact:	Lucie Maňásková

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:	1504542
	Show dependency tree / graph

Reported:	2017-03-10 01:21 EST by Venkata Tadimarri
Modified:	2018-06-19 01:10 EDT (History)
CC List:	10 users (show)

See Also:
Fixed In Version:	samba-3.6.23-44.el6
Doc Type:	Bug Fix
Doc Text:	Users disabled in AD now can connect to Windbinb Previously, the Winbind service failed to authenticate users, which were disabled in the Active Directory (AD), using the `netlogon` service. As a consequence, Winbind terminated unexpectedly. With this update, Winbind falls back to authenticate using netlogon if it is a primary trust. As a result, Windind now works as expected.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2018-06-19 01:08:55 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Flags:	lmanasko: needinfo? (asn)

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:1860	None	None	None	2018-06-19 01:10 EDT

Groups: None (edit)

Description Venkata Tadimarri 2017-03-10 01:21:07 EST

Created attachment 1261800 [details]
sosreport of the server

Description of problem:

Winbind generates core dump when attempting to login (ssh) as a user which is disabled in AD. This issue is observed in RHEL 5 and 6 but not in 7. 


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

samba-winbind-3.6.23-36.el6_8.x86_64

How reproducible:


Steps to Reproduce:
1. Disable user in AD
2. Login with the user
3. Core dump is generated

Comment 4 Andreas Schneider 2017-03-21 06:53:28 EDT

We need debug logs showing the crash with debuginfo packages installed. The stacktrace just gives a hint but we need more information or a full backtrace from the coredump.

Comment 14 Venkata Tadimarri 2017-04-19 19:08:10 EDT

Hello Andreas,

Please find the requested information.

functional level is 2008r2.
The users are on the nbnme domain which has a trust with the nbndc domain.
The servers are connected to the nbndc domain and there is a trust between the domains.

Comment 15 Andreas Schneider 2017-04-20 10:36:34 EDT

I will try to reproduce it tomorrow.

Comment 47 errata-xmlrpc 2018-06-19 01:08:55 EDT

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://access.redhat.com/errata/RHSA-2018:1860

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