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OpenAdvisories
Medium RHSA-2023:2502 2 CVEs

Red Hat Security Advisory: dhcp security and enhancement update

Published Sep 16, 2024 · Updated Jul 3, 2026

Ecosystem: Red Hat

Fixed packages 10

ReleasePackageFixed in
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-client 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-client-debuginfo 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-common 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-debuginfo 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-debugsource 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-relay 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-relay-debuginfo 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-server 12:4.4.2-18.b1.el9
Red Hat · RHEL 9 enterprise_linux:9::baseos dhcp-server-debuginfo 12:4.4.2-18.b1.el9

Vulnerabilities 2

  • Medium 6.5
    CVE-2022-2928

    An option refcount overflow exists in dhcpd

    In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decreme…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 6.5
    CVE-2022-2929

    DHCP memory leak

    In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory.

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • article
    https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/9.2_release_notes/index
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2095396
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2132001
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2132002
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2023/rhsa-2023_2502.json
  • report
    https://access.redhat.com/security/cve/CVE-2022-2928
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2022-2928
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2022-2928
  • article
    https://kb.isc.org/docs/cve-2022-2928
  • report
    https://access.redhat.com/security/cve/CVE-2022-2929
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2022-2929
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2022-2929
  • article
    https://kb.isc.org/docs/cve-2022-2929