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CVE-2018-5733

CVE-2018-5733 · A malicious client can overflow a reference counter in ISC dhcpd

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

A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.

CVSS 5.9 · Medium · EPSS 20.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • isc dhcp

    Versions
    • ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0: Affected

    No fix published

  • isc-dhcp Debian:12

    Affected ranges
    • ECOSYSTEM: < 4.3.5-3.1

    Update to 4.3.5-3.1

  • isc-dhcp Debian:13

    Affected ranges
    • ECOSYSTEM: < 4.3.5-3.1

    Update to 4.3.5-3.1

  • isc-dhcp Ubuntu: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
    Affected ranges
    • ECOSYSTEM: < 4.2.4-7ubuntu12.12

    Update to 4.2.4-7ubuntu12.12

  • isc-dhcp Ubuntu: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
    Affected ranges
    • ECOSYSTEM: < 4.3.3-5ubuntu12.9

    Update to 4.3.3-5ubuntu12.9

  • isc-dhcp Ubuntu:18.04:LTS

    Versions
    • 4.3.5-3ubuntu2
    • 4.3.5-3ubuntu3
    • 4.3.5-3ubuntu4
    Affected ranges
    • ECOSYSTEM: < 4.3.5-3ubuntu5

    Update to 4.3.5-3ubuntu5

Original sources

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