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Bug 728267

Summary:	When non-posix groups are skipped, initgroups returns random GID
Product:	Red Hat Enterprise Linux 6	Reporter:	Stephen Gallagher <sgallagh>
Component:	sssd	Assignee:	Stephen Gallagher <sgallagh>
Status:	CLOSED ERRATA	QA Contact:	Chandrasekar Kannan <ckannan>
Severity:	unspecified	Docs Contact:
Priority:	medium
Version:	6.1	CC:	benl, grajaiya, jgalipea, jhrozek, kbanerje, prc
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	sssd-1.5.1-46.el6	Doc Type:	Bug Fix
Doc Text:	Cause: When processing group memberships for a user who is a member of a group lacking POSIX attributes, loop index was incremented even for groups that should be skipped Consequence: Instead of being skipped, non-POSIX groups were returned with a random GID Fix: The loop index was only incremented for valid POSIX groups Result: non-POSIX groups are skipped and correct group membership is returned	Story Points:	---
Clone Of:
Clones:	748865 (view as bug list)		Environment:
Last Closed:	2011-12-06 16:39:16 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	725868, 748857, 748865

Description Stephen Gallagher 2011-08-04 14:38:54 UTC

Description of problem:
A bug in indexing of GIDs when a groups is skipped causes random data to be returned during initgroups.

When a group is skipped, we must not increment the buffer index.

Comment 5 Kaushik Banerjee 2011-09-27 08:05:53 UTC

Verified in version:

# rpm -qi sssd | head
Name        : sssd                         Relocations: (not relocatable)
Version     : 1.5.1                             Vendor: Red Hat, Inc.
Release     : 52.el6                        Build Date: Tue 20 Sep 2011 09:11:03 PM IST
Install Date: Mon 26 Sep 2011 05:56:30 PM IST      Build Host: x86-010.build.bos.redhat.com
Group       : Applications/System           Source RPM: sssd-1.5.1-52.el6.src.rpm
Size        : 3550647                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : System Security Services Daemon

Comment 6 Jakub Hrozek 2011-10-27 15:10:57 UTC

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
Cause: When processing group memberships for a user who is a member of a group lacking POSIX attributes, loop index was incremented even for groups that should be skipped
Consequence: Instead of being skipped, non-POSIX groups were returned with a random GID
Fix: The loop index was only incremented for valid POSIX groups
Result: non-POSIX groups are skipped and correct group membership is returned

Comment 7 errata-xmlrpc 2011-12-06 16:39:16 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.

http://rhn.redhat.com/errata/RHBA-2011-1529.html