Bug 1125410 (CVE-2019-3824)

Summary:	VUL-0: CVE-2019-3824: samba: ldb: Out of bound read in ldb_wildcard_compare
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Marcus Meissner <meissner>
Component:	Incidents	Assignee:	Novell Samba Team <samba>
Status:	RESOLVED FIXED	QA Contact:	Security Team bot <security-team>
Severity:	Minor
Priority:	P4 - Low	CC:	nopower, scabrero, security-team, smash_bz
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/224718/
Whiteboard:	CVSSv3:SUSE:CVE-2019-3824:6.5:(AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Comment 5 Marcus Meissner 2019-02-26 05:36:25 UTC

is public

https://bugzilla.samba.org/show_bug.cgi?id=CVE-2019-3824

===========================================================
== Subject:     ldb: Out of bound read in ldb_wildcard_compare
==
== CVE ID#:     CVE-2019-3824
==
== Versions:    Samba 4.9 and earlier
==
== Summary:     A user with read permission on the LDAP server
                can crash the shared LDAP server process of the Samba
		AD DC
===========================================================

===========
Description
===========

By using a search expression like (cn=test*multi*test*multi) an
authenticated user can crash the shared LDAP process of the AD DC

Note that in Samba 4.7 and later, the default is not to have a
shared LDAP process, unless -M prefork or -M single is specified on
the command line to 'samba'.

==================
Patch Availability
==================

Patches addressing both these issues have been posted to:

    http://www.samba.org/samba/security/

Because Samba 4.7 and later use the 'standard' process model (forking)
by default, earlier versions are unsupported and no data is returned,
no Samba security releases will be made.

Samba administrators are advised to upgrade to supported releases or apply
the patch as soon as possible.

==================
CVSSv3 calculation
==================

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

==========
Workaround
==========

If the Samba 4.7 or later AD DC is being run with the -M single or -M
prefork command line argument to the 'samba' binary, return to the
default (standard) mode.

=======
Credits
=======

Analysis by Garming Sam of Catalyst and the Samba Team

Patches provided by Lukas Slebodnik of Red Hat, advisory by Andrew
Bartlett of Catalyst and the Samba Team.

==========================================================
== Our Code, Our Bugs, Our Responsibility.
== The Samba Team
==========================================================

Comment 7 Swamp Workflow Management 2019-03-19 17:10:51 UTC

SUSE-SU-2019:0639-1: An update that fixes one vulnerability is now available.

Category: security (moderate)
Bug References: 1125410
CVE References: CVE-2019-3824
Sources used:
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 (src):    ldb-1.2.3-3.8.1
SUSE Linux Enterprise Module for Basesystem 15 (src):    ldb-1.2.3-3.8.1

Comment 8 Swamp Workflow Management 2019-04-05 13:10:14 UTC

openSUSE-SU-2019:1163-1: An update that fixes one vulnerability is now available.

Category: security (moderate)
Bug References: 1125410
CVE References: CVE-2019-3824
Sources used:
openSUSE Leap 15.0 (src):    ldb-1.2.3-lp150.7.2

*** NOTE: This information is not intended to be used for external
    communication, because this may only be a partial fix.
    If you have questions please reach out to maintenance coordination.

Comment 9 Marcus Meissner 2019-04-05 13:11:52 UTC

we are done

Comment 11 Swamp Workflow Management 2019-04-10 10:09:42 UTC

openSUSE-SU-2019:1180-1: An update that solves one vulnerability and has 5 fixes is now available.

Category: security (important)
Bug References: 1114407,1124223,1125410,1126377,1131060,1131686
CVE References: CVE-2019-3880
Sources used:
openSUSE Leap 15.0 (src):    ldb-1.2.4-lp150.10.1, samba-4.7.11+git.153.b36ceaf2235-lp150.3.14.1

*** NOTE: This information is not intended to be used for external
    communication, because this may only be a partial fix.
    If you have questions please reach out to maintenance coordination.

Comment 12 Swamp Workflow Management 2019-04-25 22:09:56 UTC

SUSE-SU-2019:1040-1: An update that solves one vulnerability and has 5 fixes is now available.

Category: security (important)
Bug References: 1114407,1124223,1125410,1126377,1131060,1131686
CVE References: CVE-2019-3880
Sources used:
SUSE Linux Enterprise Module for Packagehub Subpackages 15 (src):    avahi-0.6.32-5.5.3, samba-4.7.11+git.153.b36ceaf2235-4.27.1
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 (src):    avahi-0.6.32-5.5.3, avahi-glib2-0.6.32-5.5.8, gnutls-3.6.2-6.5.4, ldb-1.2.4-3.12.1, libnettle-3.4.1-4.9.1, samba-4.7.11+git.153.b36ceaf2235-4.27.1, tdb-1.3.15-3.6.3, tevent-0.9.36-4.10.3
SUSE Linux Enterprise Module for Development Tools 15 (src):    cups-2.2.7-3.11.7
SUSE Linux Enterprise Module for Desktop Applications 15 (src):    avahi-0.6.32-5.5.3, avahi-glib2-0.6.32-5.5.8, cups-2.2.7-3.11.7, gnutls-3.6.2-6.5.4, libnettle-3.4.1-4.9.1, libtasn1-4.13-4.2.1, p11-kit-0.23.2-4.2.1
SUSE Linux Enterprise Module for Basesystem 15 (src):    avahi-0.6.32-5.5.3, avahi-glib2-0.6.32-5.5.8, cups-2.2.7-3.11.7, gamin-devel-0.1.10-3.2.3, gnutls-3.6.2-6.5.4, ldb-1.2.4-3.12.1, libnettle-3.4.1-4.9.1, libtasn1-4.13-4.2.1, p11-kit-0.23.2-4.2.1, samba-4.7.11+git.153.b36ceaf2235-4.27.1, talloc-2.1.11-3.5.3, talloc-man-2.1.11-3.5.3, tdb-1.3.15-3.6.3, tevent-0.9.36-4.10.3, tevent-man-0.9.36-4.10.3
SUSE Linux Enterprise High Availability 15 (src):    samba-4.7.11+git.153.b36ceaf2235-4.27.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.