RHSA-2021:2357: Important: dhcp security update
First published: Wed Jun 09 2021(Updated: )
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.<br>Security Fix(es):<br><li> 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)</li> 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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/dhcp | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhclient | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-common | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-debuginfo | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-debuginfo | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-devel | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-devel | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-libs | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-libs | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhclient | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-common | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhclient | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-common | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-debuginfo | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-devel | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
| redhat/dhcp-libs | <4.2.5-83.el7_9.1 | 4.2.5-83.el7_9.1 |
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Reference Links
Frequently Asked Questions
What is the severity of RHSA-2021:2357?
The severity of RHSA-2021:2357 is classified as important.
How do I fix RHSA-2021:2357?
To fix RHSA-2021:2357, you should update the affected DHCP packages to version 4.2.5-83.el7_9.1 or higher.
Which systems are affected by RHSA-2021:2357?
RHSA-2021:2357 affects systems using the dhcp packages on Red Hat Enterprise Linux 7.
What are the affected packages in RHSA-2021:2357?
The affected packages in RHSA-2021:2357 include dhcp, dhclient, dhcp-common, dhcp-devel, and dhcp-libs.
What does RHSA-2021:2357 address?
RHSA-2021:2357 addresses vulnerabilities in the DHCP protocol implementation that may expose systems to risks.
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