<p>Upgrade <code>Ubuntu:14.04</code> <code>isc-dhcp</code> to version 4.2.4-7ubuntu12.12 or higher.</p>

Integer Overflow or Wraparound Affecting isc-dhcp package, versions <4.2.4-7ubuntu12.12

Snyk CVSS

Attack Complexity Low

Availability High

Threat Intelligence

EPSS 7.11% (94^th percentile)

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Snyk ID SNYK-UBUNTU1404-ISCDHCP-382232
published 27 Jun 2018
disclosed 16 Jan 2019

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Introduced: 27 Jun 2018

CVE-2018-5733 Open this link in a new tab CWE-190 Open this link in a new tab

How to fix?

Upgrade Ubuntu:14.04 isc-dhcp to version 4.2.4-7ubuntu12.12 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream isc-dhcp package and not the isc-dhcp package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 relevant fixed versions and status.

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.