CVE-2018-5733

Publication date 1 March 2018

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
isc-dhcp 18.04 LTS bionic
Fixed 4.3.5-3ubuntu5
17.10 artful
Fixed 4.3.5-3ubuntu2.2
16.04 LTS xenial
Fixed 4.3.3-5ubuntu12.9
14.04 LTS trusty
Fixed 4.2.4-7ubuntu12.12

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references