Vulnerability Monitor

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CVE-2018-5733

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.

Published

2019-01-16T20:29:00.753

Last Modified

2025-04-25T23:15:15.590

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-190
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application isc dhcp ≤ 4.2.8 Yes
Application isc dhcp ≤ 4.3.6 Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1.0 Yes
Application isc dhcp 4.4.0 Yes
Operating System redhat enterprise_linux_desktop 6.0 Yes
Operating System redhat enterprise_linux_desktop 7.0 Yes
Operating System redhat enterprise_linux_server 6.0 Yes
Operating System redhat enterprise_linux_server 7.0 Yes
Operating System redhat enterprise_linux_server_aus 7.4 Yes
Operating System redhat enterprise_linux_server_aus 7.6 Yes
Operating System redhat enterprise_linux_server_eus 7.4 Yes
Operating System redhat enterprise_linux_server_eus 7.5 Yes
Operating System redhat enterprise_linux_server_eus 7.6 Yes
Operating System redhat enterprise_linux_workstation 6.0 Yes
Operating System redhat enterprise_linux_workstation 7.0 Yes
Operating System canonical ubuntu_linux 14.04 Yes
Operating System canonical ubuntu_linux 16.04 Yes
Operating System canonical ubuntu_linux 17.10 Yes
Operating System debian debian_linux 7.0 Yes
Operating System debian debian_linux 8.0 Yes
Operating System debian debian_linux 9.0 Yes
References