A dhcp security update has been released for Red Hat Enterprise Linux 7.3.
RHSA-2021:2415-01: Important: dhcp security update
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Red Hat Security Advisory
Synopsis: Important: dhcp security update
Advisory ID: RHSA-2021:2415-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2415
Issue date: 2021-06-14
CVE Names: CVE-2021-25217
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1. Summary:
An update for dhcp is now available for Red Hat Enterprise Linux 7.3
Advanced Update Support.
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 Server AUS (v. 7.3) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.3) - 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 Server AUS (v. 7.3):
Source:
dhcp-4.2.5-47.el7_3.2.src.rpm
x86_64:
dhclient-4.2.5-47.el7_3.2.x86_64.rpm
dhcp-4.2.5-47.el7_3.2.x86_64.rpm
dhcp-common-4.2.5-47.el7_3.2.x86_64.rpm
dhcp-debuginfo-4.2.5-47.el7_3.2.i686.rpm
dhcp-debuginfo-4.2.5-47.el7_3.2.x86_64.rpm
dhcp-libs-4.2.5-47.el7_3.2.i686.rpm
dhcp-libs-4.2.5-47.el7_3.2.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.3):
x86_64:
dhcp-debuginfo-4.2.5-47.el7_3.2.i686.rpm
dhcp-debuginfo-4.2.5-47.el7_3.2.x86_64.rpm
dhcp-devel-4.2.5-47.el7_3.2.i686.rpm
dhcp-devel-4.2.5-47.el7_3.2.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.
