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Bug 1200093

Summary:	sssd_nss segfaults if initgroups request is by UPN and doesn't find anything
Product:	Red Hat Enterprise Linux 6	Reporter:	Jakub Hrozek <jhrozek>
Component:	sssd	Assignee:	Jakub Hrozek <jhrozek>
Status:	CLOSED ERRATA	QA Contact:	Kaushik Banerjee <kbanerje>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.6	CC:	apeetham, grajaiya, jgalipea, jhrozek, lslebodn, mkosek, mzidek, pbrezina, preichl
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	sssd-1.12.4-15.el6	Doc Type:	Bug Fix
Doc Text:	Do not document.	Story Points:	---
Clone Of:
Clones:	1201271 (view as bug list)		Environment:
Last Closed:	2015-07-22 06:43:21 UTC	Type:	---
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:	1201271

Description Jakub Hrozek 2015-03-09 16:53:02 UTC

This bug is created as a clone of upstream ticket:
https://fedorahosted.org/sssd/ticket/2598

If a client requests initgroups by UPN for a user that doesn't exist, sssd_nss crashes.

Please note it's not sufficient to test using "id" as "id" does "getpwnam" first which finds the user doesn't exist before running initgroups.

Comment 2 Jakub Hrozek 2015-03-12 09:18:21 UTC

Fixed upstream:
    master:
        aa648535f445e7a95bf6dedc7c43bb5f94ab7354
        ff19b24a93a50c8a62b5c2621e45d101e3a00781
        84a4c4fcc93b3dcc70604817a05f7943606ff596
        9cc2223e0bc0478c1b47a47fd71bba7e7129492d 
    sssd-1-12:
        d8006abd55f2ce0698e09213b8374e9071e70016 (only the fix without unit tests)

Comment 4 Jenny Severance 2015-04-15 12:32:55 UTC

Please add steps to reproduce and verify this issue

Comment 5 Jakub Hrozek 2015-04-15 12:40:14 UTC

Compile the program in comment 1 and pass a UPN that doesn't exist as an argument. That should do the trick and SSSD should crash with unpatched packages and return an error gracefully with patched packages.

Comment 6 Amith 2015-05-20 13:20:02 UTC

Verified the bug on SSSD Version : sssd-1.12.4-40.el6.x86_64

Steps followed during verification:

1. Compile the program mentioned in comment #1

2. Setup SSSD client against AD Server.

3. Execute the program against a non-existing UPN.

4. With the latest build, process sssd_nss shouldn't crash.

Log from /var/log/sssd/sssd_nss.log :
[sssd[nss]] [sss_ncache_set_str] (0x0400): Adding [NCE/USER/AD2/non-existing-user] to negative cache
[sssd[nss]] [nss_cmd_initgroups_search] (0x0040): No results for initgroups call
[sssd[nss]] [sss_dp_req_destructor] (0x0400): Deleting request: [0x41c250:3:non-existing-user@AD2]

Comment 8 errata-xmlrpc 2015-07-22 06:43:21 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-2015-1448.html