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

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

Synopsis:          Moderate: dhcp security and bug fix update
Advisory ID:       RHSA-2019:2060-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2060
Issue date:        2019-08-06
CVE Names:         CVE-2019-6470
====================================================================
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 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) - 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

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: double-deletion of the released addresses in the dhcpv6 code
leading to crash and possible DoS (CVE-2019-6470)

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

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.7 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/):

1574292 - "dhclient -I" shows "cant find device client" after upgrade
1613174 - ISC dhcpd cannot start TLS session to 389-DS after updating openldap rpm
1623792 - /var/lib/dhcpd/dhcpd.leases: file is too long to buffer. is displayed when dhcpd tries to start.
1672308 - Avoid unnecessary DHCPD restarts by NetworkManager on certain UP events w.r.t. bug #565921
1677382 - dhcp does not compile with rebased bind 9.11
1708641 - CVE-2019-6470 dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
dhcp-4.2.5-77.el7.src.rpm

x86_64:
dhclient-4.2.5-77.el7.x86_64.rpm
dhcp-common-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-libs-4.2.5-77.el7.i686.rpm
dhcp-libs-4.2.5-77.el7.x86_64.rpm

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

x86_64:
dhcp-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-devel-4.2.5-77.el7.i686.rpm
dhcp-devel-4.2.5-77.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
dhcp-4.2.5-77.el7.src.rpm

x86_64:
dhclient-4.2.5-77.el7.x86_64.rpm
dhcp-common-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-libs-4.2.5-77.el7.i686.rpm
dhcp-libs-4.2.5-77.el7.x86_64.rpm

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

x86_64:
dhcp-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-devel-4.2.5-77.el7.i686.rpm
dhcp-devel-4.2.5-77.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
dhcp-4.2.5-77.el7.src.rpm

ppc64:
dhclient-4.2.5-77.el7.ppc64.rpm
dhcp-4.2.5-77.el7.ppc64.rpm
dhcp-common-4.2.5-77.el7.ppc64.rpm
dhcp-debuginfo-4.2.5-77.el7.ppc.rpm
dhcp-debuginfo-4.2.5-77.el7.ppc64.rpm
dhcp-libs-4.2.5-77.el7.ppc.rpm
dhcp-libs-4.2.5-77.el7.ppc64.rpm

ppc64le:
dhclient-4.2.5-77.el7.ppc64le.rpm
dhcp-4.2.5-77.el7.ppc64le.rpm
dhcp-common-4.2.5-77.el7.ppc64le.rpm
dhcp-debuginfo-4.2.5-77.el7.ppc64le.rpm
dhcp-libs-4.2.5-77.el7.ppc64le.rpm

s390x:
dhclient-4.2.5-77.el7.s390x.rpm
dhcp-4.2.5-77.el7.s390x.rpm
dhcp-common-4.2.5-77.el7.s390x.rpm
dhcp-debuginfo-4.2.5-77.el7.s390.rpm
dhcp-debuginfo-4.2.5-77.el7.s390x.rpm
dhcp-libs-4.2.5-77.el7.s390.rpm
dhcp-libs-4.2.5-77.el7.s390x.rpm

x86_64:
dhclient-4.2.5-77.el7.x86_64.rpm
dhcp-4.2.5-77.el7.x86_64.rpm
dhcp-common-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-libs-4.2.5-77.el7.i686.rpm
dhcp-libs-4.2.5-77.el7.x86_64.rpm

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

ppc64:
dhcp-debuginfo-4.2.5-77.el7.ppc.rpm
dhcp-debuginfo-4.2.5-77.el7.ppc64.rpm
dhcp-devel-4.2.5-77.el7.ppc.rpm
dhcp-devel-4.2.5-77.el7.ppc64.rpm

ppc64le:
dhcp-debuginfo-4.2.5-77.el7.ppc64le.rpm
dhcp-devel-4.2.5-77.el7.ppc64le.rpm

s390x:
dhcp-debuginfo-4.2.5-77.el7.s390.rpm
dhcp-debuginfo-4.2.5-77.el7.s390x.rpm
dhcp-devel-4.2.5-77.el7.s390.rpm
dhcp-devel-4.2.5-77.el7.s390x.rpm

x86_64:
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-devel-4.2.5-77.el7.i686.rpm
dhcp-devel-4.2.5-77.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
dhcp-4.2.5-77.el7.src.rpm

x86_64:
dhclient-4.2.5-77.el7.x86_64.rpm
dhcp-4.2.5-77.el7.x86_64.rpm
dhcp-common-4.2.5-77.el7.x86_64.rpm
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-libs-4.2.5-77.el7.i686.rpm
dhcp-libs-4.2.5-77.el7.x86_64.rpm

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

x86_64:
dhcp-debuginfo-4.2.5-77.el7.i686.rpm
dhcp-debuginfo-4.2.5-77.el7.x86_64.rpm
dhcp-devel-4.2.5-77.el7.i686.rpm
dhcp-devel-4.2.5-77.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-2019-6470
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.7_release_notes/index

8. Contact:

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

Copyright 2019 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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IHX9
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce