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

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

                               ESB-2021.2072
                           dhcp security update
                               10 June 2021

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

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

Product:           dhcp
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-25217  

Reference:         ESB-2021.1935
                   ESB-2021.1874

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2021:2359
   https://access.redhat.com/errata/RHSA-2021:2357

Comment: This bulletin contains two (2) Red Hat security advisories.

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

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

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

Synopsis:          Important: dhcp security update
Advisory ID:       RHSA-2021:2359-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:2359
Issue date:        2021-06-09
CVE Names:         CVE-2021-25217 
=====================================================================

1. Summary:

An update for dhcp is now available for Red Hat Enterprise Linux 8.

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 BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, 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 BaseOS (v. 8):

Source:
dhcp-4.3.6-44.el8_4.1.src.rpm

aarch64:
dhcp-client-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-client-debuginfo-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-debuginfo-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-debugsource-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-libs-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-libs-debuginfo-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-relay-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-relay-debuginfo-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-server-4.3.6-44.el8_4.1.aarch64.rpm
dhcp-server-debuginfo-4.3.6-44.el8_4.1.aarch64.rpm

noarch:
dhcp-common-4.3.6-44.el8_4.1.noarch.rpm

ppc64le:
dhcp-client-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-client-debuginfo-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-debuginfo-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-debugsource-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-libs-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-libs-debuginfo-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-relay-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-relay-debuginfo-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-server-4.3.6-44.el8_4.1.ppc64le.rpm
dhcp-server-debuginfo-4.3.6-44.el8_4.1.ppc64le.rpm

s390x:
dhcp-client-4.3.6-44.el8_4.1.s390x.rpm
dhcp-client-debuginfo-4.3.6-44.el8_4.1.s390x.rpm
dhcp-debuginfo-4.3.6-44.el8_4.1.s390x.rpm
dhcp-debugsource-4.3.6-44.el8_4.1.s390x.rpm
dhcp-libs-4.3.6-44.el8_4.1.s390x.rpm
dhcp-libs-debuginfo-4.3.6-44.el8_4.1.s390x.rpm
dhcp-relay-4.3.6-44.el8_4.1.s390x.rpm
dhcp-relay-debuginfo-4.3.6-44.el8_4.1.s390x.rpm
dhcp-server-4.3.6-44.el8_4.1.s390x.rpm
dhcp-server-debuginfo-4.3.6-44.el8_4.1.s390x.rpm

x86_64:
dhcp-client-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-client-debuginfo-4.3.6-44.el8_4.1.i686.rpm
dhcp-client-debuginfo-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-debuginfo-4.3.6-44.el8_4.1.i686.rpm
dhcp-debuginfo-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-debugsource-4.3.6-44.el8_4.1.i686.rpm
dhcp-debugsource-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-libs-4.3.6-44.el8_4.1.i686.rpm
dhcp-libs-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-libs-debuginfo-4.3.6-44.el8_4.1.i686.rpm
dhcp-libs-debuginfo-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-relay-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-relay-debuginfo-4.3.6-44.el8_4.1.i686.rpm
dhcp-relay-debuginfo-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-server-4.3.6-44.el8_4.1.x86_64.rpm
dhcp-server-debuginfo-4.3.6-44.el8_4.1.i686.rpm
dhcp-server-debuginfo-4.3.6-44.el8_4.1.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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=woof
- -----END PGP SIGNATURE-----

- -----------------------------------------------------------------------------------------------------------------------------

- -----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-----

- --

- --------------------------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

iQIVAwUBYMFzBeNLKJtyKPYoAQhwug//fRDl3P+wClBVJxnb3uZEh82ExsMnGulG
03wSNR9Iap8oGUeLb9j0JrsSH0RBwBNRo4HKm4dksVL/jJ27rTU9EAGCxmPCbyF4
AXyo+pF5nUQwmG9CDC/gKMurDf33ltBbUJuQgN7FICf1A2crqSuKZjT+WU+V5ySf
zyp6pcD8YJVpWVea3K4KByc/RjlETnPobz5h/WHC/zDMfX2fiePY258SLCnl6qXP
pBtIJkfR1tY19fMz8Q3G7Fm0REp3ug2N4eq0J6t8qwRlkalwsAwetHe0HaABrjn8
uyZdANyixGiwyA5lUT2IZuQCxuLn3Z+GhRMGAR2sPlF1c5DvgIBwW1LMZhrlrybN
sA5o2fVa0ivvI79gM3Kn62+w9wB3zvE93zOpunGyl0AmogpuGvnz/0M/rSc2ubR5
x2MhecNX1XLo5YZA0bUtFeLMkwhzdYcyF1b9ivxkAQ0RuEFZ1lgb2DQ8T6fZMe+i
nQZ6StFwP50XxEMmF4osfBxcEl0LR3n/6Vg6Q88i9dk2fvuEkJUm4e/PkC9uiTtZ
k4pDCxOt3T3bKsjUpccTDu/b4KrnDSC9JtQQMdVMp/yfCI3vMiRNJr7Qs/bpcpEC
ojR9Aq1Q2l/vTMqJ4NRcP0G34bjmVhskTZ6rUmUGEwq+DKJoGyGgfHzB2N+jeQZb
PFtOfGXXEXE=
=FY+a
-----END PGP SIGNATURE-----