CVE-2018-5733

high

Description

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.

References

Advisories
More

https://www.debian.org/security/2018/dsa-4133

https://usn.ubuntu.com/3586-2/

https://usn.ubuntu.com/3586-1/

https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html

https://access.redhat.com/errata/RHSA-2018:0483

https://access.redhat.com/errata/RHSA-2018:0469

http://www.securitytracker.com/id/1040437

http://www.securityfocus.com/bid/103188

https://security.netapp.com/advisory/ntap-20250425-0010/

https://kb.isc.org/docs/aa-01567

Details

Source: Mitre, NVD

Published: 2019-01-16

Updated: 2025-04-25

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.33841