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

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

Synopsis:          Important: dhcp security update
Advisory ID:       RHSA-2021:2357-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2357
Issue date:        2021-06-09
CVE Names:         CVE-2021-25217
====================================================================
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

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: stack-based buffer overflow when parsing statements with
colon-separated hex digits in config or lease files in dhcpd and dhclient
(CVE-2021-25217)

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.

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/):

1963258 - CVE-2021-25217 dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
dhcp-4.2.5-83.el7_9.1.src.rpm

x86_64:
dhclient-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-common-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-libs-4.2.5-83.el7_9.1.i686.rpm
dhcp-libs-4.2.5-83.el7_9.1.x86_64.rpm

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

x86_64:
dhcp-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-devel-4.2.5-83.el7_9.1.i686.rpm
dhcp-devel-4.2.5-83.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
dhcp-4.2.5-83.el7_9.1.src.rpm

x86_64:
dhclient-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-common-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-libs-4.2.5-83.el7_9.1.i686.rpm
dhcp-libs-4.2.5-83.el7_9.1.x86_64.rpm

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

x86_64:
dhcp-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-devel-4.2.5-83.el7_9.1.i686.rpm
dhcp-devel-4.2.5-83.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
dhcp-4.2.5-83.el7_9.1.src.rpm

ppc64:
dhclient-4.2.5-83.el7_9.1.ppc64.rpm
dhcp-4.2.5-83.el7_9.1.ppc64.rpm
dhcp-common-4.2.5-83.el7_9.1.ppc64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc64.rpm
dhcp-libs-4.2.5-83.el7_9.1.ppc.rpm
dhcp-libs-4.2.5-83.el7_9.1.ppc64.rpm

ppc64le:
dhclient-4.2.5-83.el7_9.1.ppc64le.rpm
dhcp-4.2.5-83.el7_9.1.ppc64le.rpm
dhcp-common-4.2.5-83.el7_9.1.ppc64le.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc64le.rpm
dhcp-libs-4.2.5-83.el7_9.1.ppc64le.rpm

s390x:
dhclient-4.2.5-83.el7_9.1.s390x.rpm
dhcp-4.2.5-83.el7_9.1.s390x.rpm
dhcp-common-4.2.5-83.el7_9.1.s390x.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.s390.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.s390x.rpm
dhcp-libs-4.2.5-83.el7_9.1.s390.rpm
dhcp-libs-4.2.5-83.el7_9.1.s390x.rpm

x86_64:
dhclient-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-common-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-libs-4.2.5-83.el7_9.1.i686.rpm
dhcp-libs-4.2.5-83.el7_9.1.x86_64.rpm

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

ppc64:
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc64.rpm
dhcp-devel-4.2.5-83.el7_9.1.ppc.rpm
dhcp-devel-4.2.5-83.el7_9.1.ppc64.rpm

ppc64le:
dhcp-debuginfo-4.2.5-83.el7_9.1.ppc64le.rpm
dhcp-devel-4.2.5-83.el7_9.1.ppc64le.rpm

s390x:
dhcp-debuginfo-4.2.5-83.el7_9.1.s390.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.s390x.rpm
dhcp-devel-4.2.5-83.el7_9.1.s390.rpm
dhcp-devel-4.2.5-83.el7_9.1.s390x.rpm

x86_64:
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-devel-4.2.5-83.el7_9.1.i686.rpm
dhcp-devel-4.2.5-83.el7_9.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
dhcp-4.2.5-83.el7_9.1.src.rpm

x86_64:
dhclient-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-common-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-libs-4.2.5-83.el7_9.1.i686.rpm
dhcp-libs-4.2.5-83.el7_9.1.x86_64.rpm

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

x86_64:
dhcp-debuginfo-4.2.5-83.el7_9.1.i686.rpm
dhcp-debuginfo-4.2.5-83.el7_9.1.x86_64.rpm
dhcp-devel-4.2.5-83.el7_9.1.i686.rpm
dhcp-devel-4.2.5-83.el7_9.1.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-2021-25217
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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9+pl
-----END PGP SIGNATURE-----

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