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CVE-2022-2928

CVE-2022-2928 · An option refcount overflow exists in dhcpd

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.

CVSS 6.5 · Medium · EPSS 0.7% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • isc dhcp

    Versions
    • 4.4.0 through versions before 4.4.3-P1: Affected
    • 4.1 ESV 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1: Affected

    No fix published

  • isc-dhcp Debian:12

    Affected ranges
    • ECOSYSTEM: < 4.4.3-2.1

    Update to 4.4.3-2.1

  • isc-dhcp Debian:13

    Affected ranges
    • ECOSYSTEM: < 4.4.3-2.1

    Update to 4.4.3-2.1

  • isc-dhcp Ubuntu:Pro:14.04:LTS

    Versions
    • 4.2.4-7ubuntu8
    • 4.2.4-7ubuntu9
    • 4.2.4-7ubuntu10
    • 4.2.4-7ubuntu11
    • 4.2.4-7ubuntu12
    • 4.2.4-7ubuntu12.1
    • 4.2.4-7ubuntu12.2
    • 4.2.4-7ubuntu12.3
    • 4.2.4-7ubuntu12.4
    • 4.2.4-7ubuntu12.5
    • 4.2.4-7ubuntu12.6
    • 4.2.4-7ubuntu12.7
    • 4.2.4-7ubuntu12.8
    • 4.2.4-7ubuntu12.9
    • 4.2.4-7ubuntu12.10
    • 4.2.4-7ubuntu12.12
    • 4.2.4-7ubuntu12.13
    • 4.2.4-7ubuntu12.13+esm1
    Affected ranges
    • ECOSYSTEM: < 4.2.4-7ubuntu12.13+esm2

    Update to 4.2.4-7ubuntu12.13+esm2

  • isc-dhcp Ubuntu:Pro:16.04:LTS

    Versions
    • 4.3.1-5ubuntu3
    • 4.3.1-5ubuntu4
    • 4.3.1-5ubuntu5
    • 4.3.3-5ubuntu1
    • 4.3.3-5ubuntu2
    • 4.3.3-5ubuntu4
    • 4.3.3-5ubuntu5
    • 4.3.3-5ubuntu7
    • 4.3.3-5ubuntu8
    • 4.3.3-5ubuntu9
    • 4.3.3-5ubuntu10
    • 4.3.3-5ubuntu11
    • 4.3.3-5ubuntu12
    • 4.3.3-5ubuntu12.1
    • 4.3.3-5ubuntu12.3
    • 4.3.3-5ubuntu12.4
    • 4.3.3-5ubuntu12.6
    • 4.3.3-5ubuntu12.7
    • 4.3.3-5ubuntu12.9
    • 4.3.3-5ubuntu12.10
    • 4.3.3-5ubuntu12.10+esm1
    Affected ranges
    • ECOSYSTEM: < 4.3.3-5ubuntu12.10+esm2

    Update to 4.3.3-5ubuntu12.10+esm2

  • isc-dhcp Ubuntu:18.04:LTS

    Versions
    • 4.3.5-3ubuntu2
    • 4.3.5-3ubuntu3
    • 4.3.5-3ubuntu4
    • 4.3.5-3ubuntu5
    • 4.3.5-3ubuntu6
    • 4.3.5-3ubuntu7
    • 4.3.5-3ubuntu7.1
    • 4.3.5-3ubuntu7.2
    • 4.3.5-3ubuntu7.3
    Affected ranges
    • ECOSYSTEM: < 4.3.5-3ubuntu7.4

    Update to 4.3.5-3ubuntu7.4

  • isc-dhcp Ubuntu:20.04:LTS

    Versions
    • 4.4.1-2ubuntu5
    • 4.4.1-2ubuntu6
    • 4.4.1-2.1ubuntu1
    • 4.4.1-2.1ubuntu2
    • 4.4.1-2.1ubuntu3
    • 4.4.1-2.1ubuntu4
    • 4.4.1-2.1ubuntu5
    • 4.4.1-2.1ubuntu5.20.04.1
    • 4.4.1-2.1ubuntu5.20.04.2
    • 4.4.1-2.1ubuntu5.20.04.3
    Affected ranges
    • ECOSYSTEM: < 4.4.1-2.1ubuntu5.20.04.4

    Update to 4.4.1-2.1ubuntu5.20.04.4

  • isc-dhcp Ubuntu:22.04:LTS

    Versions
    • 4.4.1-2.3ubuntu1
    • 4.4.1-2.3ubuntu2
    • 4.4.1-2.3ubuntu2.1
    • 4.4.1-2.3ubuntu2.2
    Affected ranges
    • ECOSYSTEM: < 4.4.1-2.3ubuntu2.3

    Update to 4.4.1-2.3ubuntu2.3

Original sources

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