CVE-2018-5733

HIGH

ISC DHCP <4.1-ESV-R15, 4.2.8, 4.3.6, 4.4.0 - DoS

Title source: llm
STIX 2.1

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 (10)

Core 10
Core References
Vendor Advisory x_refsource_confirm
https://kb.isc.org/docs/aa-01567
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0469
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2018/dsa-4133
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3586-2/
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0483
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3586-1/
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/103188
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1040437
Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html

Scores

CVSS v3 7.5
EPSS 0.1026
EPSS Percentile 93.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-190
Status published
Products (17)
canonical/ubuntu_linux 14.04
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 17.10
debian/debian_linux 7.0
debian/debian_linux 8.0
debian/debian_linux 9.0
isc/dhcp 4.1-esv (34 CPE variants)
isc/dhcp 4.1.0
isc/dhcp 4.4.0
isc/dhcp 4.2.0 - 4.2.8
... and 7 more
Published Jan 16, 2019
Tracked Since Feb 18, 2026