QID 239430

Date Published: 2021-06-21

QID 239430: Red Hat Update for dhcp (RHSA-2021:2420)

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)

Affected Products:

Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.2 x86_64
Red Hat Enterprise Linux Server - AUS 8.2 x86_64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
Red Hat Enterprise Linux Server - TUS 8.2 x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

On successful exploitation, it could allow an attacker to execute code.

  • CVSS V3 rated as High - 7.4 severity.
  • CVSS V2 rated as Medium - 3.3 severity.
    • Solution
    Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.

    Refer to Red Hat security advisory RHSA-2021:2420 to address this issue and obtain more information.

    Vendor References

    CVEs related to QID 239430

    CVE-2021-25217 |
    Software Advisories
    Advisory ID Software Component Link
    RHSA-2021:2420 Red Hat Enterprise Linux URL Logo access.redhat.com/errata/RHSA-2021:2420?language=en
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