CVE-2018-5733

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.

• CWE-190

• http://www.securityfocus.com/bid/103188Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040437Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:0469Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:0483Third Party Advisory
• https://kb.isc.org/docs/aa-01567Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlThird Party Advisory
• https://usn.ubuntu.com/3586-1/Third Party Advisory
• https://usn.ubuntu.com/3586-2/Third Party Advisory
• https://www.debian.org/security/2018/dsa-4133Third Party Advisory
• http://www.securityfocus.com/bid/103188Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040437Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2018:0469Third Party Advisory
• https://access.redhat.com/errata/RHSA-2018:0483Third Party Advisory
• https://kb.isc.org/docs/aa-01567Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlThird Party Advisory
• https://security.netapp.com/advisory/ntap-20250425-0010/
• https://usn.ubuntu.com/3586-1/Third Party Advisory
• https://usn.ubuntu.com/3586-2/Third Party Advisory
• https://www.debian.org/security/2018/dsa-4133Third Party Advisory

Published

Jan 16, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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