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Category:   Application (Directory)  >   OpenLDAP Vendors:   OpenLDAP.org
(Red Hat Issues Fix) OpenLDAP Double Free Memory Error Lets Remote Authenticated Users Cause the Target slapd Service to Crash
SecurityTracker Alert ID:  1039046
SecurityTracker URL:  http://securitytracker.com/id/1039046
CVE Reference:   CVE-2017-9287   (Links to External Site)
Date:  Aug 1 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in OpenLDAP. A remote authenticated user can cause the target service to crash.

A remote authenticated user that can search the directory can issue a specially crafted search query that includes the Paged Results control set to a page size of 0 to trigger a double free memory error in 'servers/slapd/back-mdb/search.c' and cause the target slapd service to crash.

Karsten Heymann reported this vulnerability.

Impact:   A remote authenticated user can cause the target slapd service to crash.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://access.redhat.com/errata/RHSA-2017:1852

Vendor URL:  access.redhat.com/errata/RHSA-2017:1852 (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
May 31 2017 OpenLDAP Double Free Memory Error Lets Remote Authenticated Users Cause the Target slapd Service to Crash



 Source Message Contents

Subject:  [RHSA-2017:1852-01] Moderate: openldap security, bug fix, and enhancement update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: openldap security, bug fix, and enhancement update
Advisory ID:       RHSA-2017:1852-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:1852
Issue date:        2017-08-01
CVE Names:         CVE-2017-9287 
=====================================================================

1. Summary:

An update for openldap is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

OpenLDAP is an open-source suite of Lightweight Directory Access Protocol
(LDAP) applications and development tools. LDAP is a set of protocols used
to access and maintain distributed directory information services over an
IP network. The openldap packages contain configuration files, libraries,
and documentation for OpenLDAP.

The following packages have been upgraded to a later upstream version:
openldap (2.4.44). (BZ#1386365)

Security Fix(es):

* A double-free flaw was found in the way OpenLDAP's slapd server using the
MDB backend handled LDAP searches. A remote attacker with access to search
the directory could potentially use this flaw to crash slapd by issuing a
specially crafted LDAP search query. (CVE-2017-9287)

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1405354 - [RHEL7] openldap does not re-register nss shutdown callbacks after nss_Shutdown is called
1432907 - Cipher suite mismatch with latest nss
1456712 - CVE-2017-9287 openldap: Double free vulnerability in servers/slapd/back-mdb/search.c

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
openldap-2.4.44-5.el7.src.rpm

x86_64:
openldap-2.4.44-5.el7.i686.rpm
openldap-2.4.44-5.el7.x86_64.rpm
openldap-clients-2.4.44-5.el7.x86_64.rpm
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-devel-2.4.44-5.el7.i686.rpm
openldap-devel-2.4.44-5.el7.x86_64.rpm
openldap-servers-2.4.44-5.el7.x86_64.rpm
openldap-servers-sql-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
openldap-2.4.44-5.el7.src.rpm

x86_64:
openldap-2.4.44-5.el7.i686.rpm
openldap-2.4.44-5.el7.x86_64.rpm
openldap-clients-2.4.44-5.el7.x86_64.rpm
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-devel-2.4.44-5.el7.i686.rpm
openldap-devel-2.4.44-5.el7.x86_64.rpm
openldap-servers-2.4.44-5.el7.x86_64.rpm
openldap-servers-sql-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
openldap-2.4.44-5.el7.src.rpm

aarch64:
openldap-2.4.44-5.el7.aarch64.rpm
openldap-clients-2.4.44-5.el7.aarch64.rpm
openldap-debuginfo-2.4.44-5.el7.aarch64.rpm
openldap-devel-2.4.44-5.el7.aarch64.rpm
openldap-servers-2.4.44-5.el7.aarch64.rpm

ppc64:
openldap-2.4.44-5.el7.ppc.rpm
openldap-2.4.44-5.el7.ppc64.rpm
openldap-clients-2.4.44-5.el7.ppc64.rpm
openldap-debuginfo-2.4.44-5.el7.ppc.rpm
openldap-debuginfo-2.4.44-5.el7.ppc64.rpm
openldap-devel-2.4.44-5.el7.ppc.rpm
openldap-devel-2.4.44-5.el7.ppc64.rpm
openldap-servers-2.4.44-5.el7.ppc64.rpm

ppc64le:
openldap-2.4.44-5.el7.ppc64le.rpm
openldap-clients-2.4.44-5.el7.ppc64le.rpm
openldap-debuginfo-2.4.44-5.el7.ppc64le.rpm
openldap-devel-2.4.44-5.el7.ppc64le.rpm
openldap-servers-2.4.44-5.el7.ppc64le.rpm

s390x:
openldap-2.4.44-5.el7.s390.rpm
openldap-2.4.44-5.el7.s390x.rpm
openldap-clients-2.4.44-5.el7.s390x.rpm
openldap-debuginfo-2.4.44-5.el7.s390.rpm
openldap-debuginfo-2.4.44-5.el7.s390x.rpm
openldap-devel-2.4.44-5.el7.s390.rpm
openldap-devel-2.4.44-5.el7.s390x.rpm
openldap-servers-2.4.44-5.el7.s390x.rpm

x86_64:
openldap-2.4.44-5.el7.i686.rpm
openldap-2.4.44-5.el7.x86_64.rpm
openldap-clients-2.4.44-5.el7.x86_64.rpm
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-devel-2.4.44-5.el7.i686.rpm
openldap-devel-2.4.44-5.el7.x86_64.rpm
openldap-servers-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

aarch64:
openldap-debuginfo-2.4.44-5.el7.aarch64.rpm
openldap-servers-sql-2.4.44-5.el7.aarch64.rpm

ppc64:
openldap-debuginfo-2.4.44-5.el7.ppc64.rpm
openldap-servers-sql-2.4.44-5.el7.ppc64.rpm

ppc64le:
openldap-debuginfo-2.4.44-5.el7.ppc64le.rpm
openldap-servers-sql-2.4.44-5.el7.ppc64le.rpm

s390x:
openldap-debuginfo-2.4.44-5.el7.s390x.rpm
openldap-servers-sql-2.4.44-5.el7.s390x.rpm

x86_64:
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-servers-sql-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
openldap-2.4.44-5.el7.src.rpm

x86_64:
openldap-2.4.44-5.el7.i686.rpm
openldap-2.4.44-5.el7.x86_64.rpm
openldap-clients-2.4.44-5.el7.x86_64.rpm
openldap-debuginfo-2.4.44-5.el7.i686.rpm
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-devel-2.4.44-5.el7.i686.rpm
openldap-devel-2.4.44-5.el7.x86_64.rpm
openldap-servers-2.4.44-5.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
openldap-debuginfo-2.4.44-5.el7.x86_64.rpm
openldap-servers-sql-2.4.44-5.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-9287
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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