Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.394
EPSS Ranking 97.1%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 5.0
References
- http://www.securityfocus.com/bid/103188
- http://www.securitytracker.com/id/1040437
- https://access.redhat.com/errata/RHSA-2018:0469
- https://access.redhat.com/errata/RHSA-2018:0483
- https://kb.isc.org/docs/aa-01567
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html
- https://usn.ubuntu.com/3586-1/
- https://usn.ubuntu.com/3586-2/
- https://www.debian.org/security/2018/dsa-4133
- http://www.securityfocus.com/bid/103188
- http://www.securitytracker.com/id/1040437
- https://access.redhat.com/errata/RHSA-2018:0469
- https://access.redhat.com/errata/RHSA-2018:0483
- https://kb.isc.org/docs/aa-01567
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html
- https://security.netapp.com/advisory/ntap-20250425-0010/
- https://usn.ubuntu.com/3586-1/
- https://usn.ubuntu.com/3586-2/
- https://www.debian.org/security/2018/dsa-4133
Products affected by CVE-2018-5733
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cpe:2.3:a:isc:dhcp:4.1-esv
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cpe:2.3:a:isc:dhcp:4.1.0
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cpe:2.3:a:isc:dhcp:4.2.0
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cpe:2.3:a:isc:dhcp:4.2.1
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cpe:2.3:a:isc:dhcp:4.2.2
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cpe:2.3:a:isc:dhcp:4.2.3
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cpe:2.3:a:isc:dhcp:4.2.4
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cpe:2.3:a:isc:dhcp:4.2.5
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cpe:2.3:a:isc:dhcp:4.2.6
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cpe:2.3:a:isc:dhcp:4.2.7
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cpe:2.3:a:isc:dhcp:4.2.8
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cpe:2.3:a:isc:dhcp:4.3.0
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cpe:2.3:a:isc:dhcp:4.3.1
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cpe:2.3:a:isc:dhcp:4.3.2
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cpe:2.3:a:isc:dhcp:4.3.3
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cpe:2.3:a:isc:dhcp:4.3.5
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cpe:2.3:a:isc:dhcp:4.3.6
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cpe:2.3:a:isc:dhcp:4.4.0
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cpe:2.3:o:canonical:ubuntu_linux:14.04
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cpe:2.3:o:canonical:ubuntu_linux:16.04
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cpe:2.3:o:canonical:ubuntu_linux:17.10
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cpe:2.3:o:debian:debian_linux:7.0
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cpe:2.3:o:debian:debian_linux:8.0
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cpe:2.3:o:debian:debian_linux:9.0
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cpe:2.3:o:redhat:enterprise_linux_desktop:6.0
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cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
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cpe:2.3:o:redhat:enterprise_linux_server:6.0
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cpe:2.3:o:redhat:enterprise_linux_server:7.0
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cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4
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cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6
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cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4
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cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5
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cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6
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cpe:2.3:o:redhat:enterprise_linux_workstation:6.0
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cpe:2.3:o:redhat:enterprise_linux_workstation:7.0