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Red Hat 9: RHSA-2022-8385-01 Moderate: DHCP Cache Poisoning Fix

red hat
Calendar Grey November 15, 2022
Dist Redhat Esm H88
Debian has issued a critical security patch addressing vulnerabilities in its network services. Ensure timely implementation.
An update for dhcp is now available for Red Hat Enterprise Linux 9

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

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):
* bind: DNS forwarders - cache poisoning vulnerability (CVE-2021-25220)
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 9.1 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory security fix Red Hat Enterprise Linux moderate severity cache poisoning network configuration dhcp update

References

https://access.redhat.com/security/cve/CVE-2021-25220 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.1_release_notes/index

Package List

Red Hat Enterprise Linux BaseOS (v. 9):
Source: dhcp-4.4.2-17.b1.el9.src.rpm
aarch64: dhcp-client-4.4.2-17.b1.el9.aarch64.rpm dhcp-client-debuginfo-4.4.2-17.b1.el9.aarch64.rpm dhcp-debuginfo-4.4.2-17.b1.el9.aarch64.rpm dhcp-debugsource-4.4.2-17.b1.el9.aarch64.rpm dhcp-relay-4.4.2-17.b1.el9.aarch64.rpm dhcp-relay-debuginfo-4.4.2-17.b1.el9.aarch64.rpm dhcp-server-4.4.2-17.b1.el9.aarch64.rpm dhcp-server-debuginfo-4.4.2-17.b1.el9.aarch64.rpm
noarch: dhcp-common-4.4.2-17.b1.el9.noarch.rpm
ppc64le: dhcp-client-4.4.2-17.b1.el9.ppc64le.rpm dhcp-client-debuginfo-4.4.2-17.b1.el9.ppc64le.rpm dhcp-debuginfo-4.4.2-17.b1.el9.ppc64le.rpm dhcp-debugsource-4.4.2-17.b1.el9.ppc64le.rpm dhcp-relay-4.4.2-17.b1.el9.ppc64le.rpm dhcp-relay-debuginfo-4.4.2-17.b1.el9.ppc64le.rpm dhcp-server-4.4.2-17.b1.el9.ppc64le.rpm dhcp-server-debuginfo-4.4.2-17.b1.el9.ppc64le.rpm
s390x: dhcp-client-4.4.2-17.b1.el9.s390x.rpm dhcp-client-debuginfo-4.4.2-17.b1.el9.s390x.rpm dhcp-debuginfo-4.4.2-17.b1.el9.s390x.rpm dhcp-debugsource-4.4.2-17.b1.el9.s390x.rpm dhcp-relay-4.4.2-17.b1.el9.s390x.rpm dhcp-relay-debuginfo-4.4.2-17.b1.el9.s390x.rpm dhcp-server-4.4.2-17.b1.el9.s390x.rpm dhcp-server-debuginfo-4.4.2-17.b1.el9.s390x.rpm
x86_64: dhcp-client-4.4.2-17.b1.el9.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2022:8385-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:8385
Issue date: 2022-11-15

Topic

An update for dhcp is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security fix Red Hat Enterprise Linux moderate severity cache poisoning network configuration dhcp update

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS (v. 9) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

2064512 - CVE-2021-25220 bind: DNS forwarders - cache poisoning vulnerability

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