RedHat: RHSA-2021-2357:01 Important: dhcp security update | LinuxSe...
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                   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 . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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RedHat: RHSA-2021-2357:01 Important: dhcp security update

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

Summary

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.

Solution

For details on how to apply this update, which includes the changesdescribed in this advisory, refer to:https://access.redhat.com/articles/11258

References

https://access.redhat.com/security/cve/CVE-2021-25217 https://access.redhat.com/security/updates/classification/#important

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/

Severity
Advisory ID: RHSA-2021:2357-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2357
Issued Date: : 2021-06-09
CVE Names: CVE-2021-25217

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

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

Bugs Fixed

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

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