CVE-2018-5733 MEDIUM

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

Vendor Isc
Product ISC DHCP
Published January 16, 2019
Last update April 25, 2025
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 16, 2019 CVE published
April 25, 2025 Record updated