ESB-2018.0724 - [RedHat] dhcp: Multiple vulnerabilities 2018-03-13

Printable version
PGP/GPG verifiable version

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0724
                      dhcp security update for RHEL 7
                               13 March 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           dhcp
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-5733 CVE-2018-5732 

Reference:         ESB-2018.0704
                   ESB-2018.0605

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2018:0483

- --------------------------BEGIN INCLUDED TEXT--------------------

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

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

Synopsis:          Important: dhcp security update
Advisory ID:       RHSA-2018:0483-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:0483
Issue date:        2018-03-12
CVE Names:         CVE-2018-5732 CVE-2018-5733 
=====================================================================

1. Summary:

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

Red Hat Product Security has rated this update as having a security impact
of Important. 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) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le

3. Description:

The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows
individual devices on an IP network to get their own network configuration
information, including an IP address, a subnet mask, and a broadcast
address. The dhcp packages provide a relay agent and ISC DHCP service
required to enable and administer DHCP on a network.

Security Fix(es):

* dhcp: Buffer overflow in dhclient possibly allowing code execution
triggered by malicious server (CVE-2018-5732)

* dhcp: Reference count overflow in dhcpd allows denial of service
(CVE-2018-5733)

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

Red Hat would like to thank ISC for reporting these issues. Upstream
acknowledges Felix Wilhelm (Google) as the original reporter of these
issues.

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/):

1549960 - CVE-2018-5732 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
1549961 - CVE-2018-5733 dhcp: Reference count overflow in dhcpd allows denial of service

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
dhcp-4.2.5-58.el7_4.3.src.rpm

x86_64:
dhclient-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-common-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-libs-4.2.5-58.el7_4.3.i686.rpm
dhcp-libs-4.2.5-58.el7_4.3.x86_64.rpm

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

x86_64:
dhcp-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-devel-4.2.5-58.el7_4.3.i686.rpm
dhcp-devel-4.2.5-58.el7_4.3.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
dhcp-4.2.5-58.el7_4.3.src.rpm

x86_64:
dhclient-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-common-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-libs-4.2.5-58.el7_4.3.i686.rpm
dhcp-libs-4.2.5-58.el7_4.3.x86_64.rpm

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

x86_64:
dhcp-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-devel-4.2.5-58.el7_4.3.i686.rpm
dhcp-devel-4.2.5-58.el7_4.3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
dhcp-4.2.5-58.el7_4.3.src.rpm

ppc64:
dhclient-4.2.5-58.el7_4.3.ppc64.rpm
dhcp-4.2.5-58.el7_4.3.ppc64.rpm
dhcp-common-4.2.5-58.el7_4.3.ppc64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64.rpm
dhcp-libs-4.2.5-58.el7_4.3.ppc.rpm
dhcp-libs-4.2.5-58.el7_4.3.ppc64.rpm

ppc64le:
dhclient-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-common-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-libs-4.2.5-58.el7_4.3.ppc64le.rpm

s390x:
dhclient-4.2.5-58.el7_4.3.s390x.rpm
dhcp-4.2.5-58.el7_4.3.s390x.rpm
dhcp-common-4.2.5-58.el7_4.3.s390x.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.s390.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.s390x.rpm
dhcp-libs-4.2.5-58.el7_4.3.s390.rpm
dhcp-libs-4.2.5-58.el7_4.3.s390x.rpm

x86_64:
dhclient-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-common-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-libs-4.2.5-58.el7_4.3.i686.rpm
dhcp-libs-4.2.5-58.el7_4.3.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
dhcp-4.2.5-58.el7_4.3.src.rpm

aarch64:
dhclient-4.2.5-58.el7_4.3.aarch64.rpm
dhcp-4.2.5-58.el7_4.3.aarch64.rpm
dhcp-common-4.2.5-58.el7_4.3.aarch64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.aarch64.rpm
dhcp-libs-4.2.5-58.el7_4.3.aarch64.rpm

ppc64le:
dhclient-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-common-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-libs-4.2.5-58.el7_4.3.ppc64le.rpm

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

ppc64:
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64.rpm
dhcp-devel-4.2.5-58.el7_4.3.ppc.rpm
dhcp-devel-4.2.5-58.el7_4.3.ppc64.rpm

ppc64le:
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-devel-4.2.5-58.el7_4.3.ppc64le.rpm

s390x:
dhcp-debuginfo-4.2.5-58.el7_4.3.s390.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.s390x.rpm
dhcp-devel-4.2.5-58.el7_4.3.s390.rpm
dhcp-devel-4.2.5-58.el7_4.3.s390x.rpm

x86_64:
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-devel-4.2.5-58.el7_4.3.i686.rpm
dhcp-devel-4.2.5-58.el7_4.3.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):

aarch64:
dhcp-debuginfo-4.2.5-58.el7_4.3.aarch64.rpm
dhcp-devel-4.2.5-58.el7_4.3.aarch64.rpm

ppc64le:
dhcp-debuginfo-4.2.5-58.el7_4.3.ppc64le.rpm
dhcp-devel-4.2.5-58.el7_4.3.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
dhcp-4.2.5-58.el7_4.3.src.rpm

x86_64:
dhclient-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-common-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-libs-4.2.5-58.el7_4.3.i686.rpm
dhcp-libs-4.2.5-58.el7_4.3.x86_64.rpm

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

x86_64:
dhcp-debuginfo-4.2.5-58.el7_4.3.i686.rpm
dhcp-debuginfo-4.2.5-58.el7_4.3.x86_64.rpm
dhcp-devel-4.2.5-58.el7_4.3.i686.rpm
dhcp-devel-4.2.5-58.el7_4.3.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-2018-5732
https://access.redhat.com/security/cve/CVE-2018-5733
https://access.redhat.com/security/updates/classification/#important
https://kb.isc.org/article/AA-01565
https://kb.isc.org/article/AA-01567

8. Contact:

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

Copyright 2018 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iD8DBQFapssuXlSAg2UNWIIRAqRcAJ9qdAd7Ccwustp61XeFc1+Wbn6czACaAzDj
rY6nxIzTK48KsZfG+q7BX0Y=
=3AKv
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=a9Hj
-----END PGP SIGNATURE-----

« Back to bulletins