CVE-2018-5733 describes a denial-of-service vulnerability in ISC DHCP versions 4.1.0 through 4.4.0, affecting various distributions including Canonical, Debian, ISC, and Red Hat. A remote, unauthenticated attacker can crash the DHCP server by sending a large volume of traffic, overflowing a 32-bit reference counter. This vulnerability has a CVSS score of 7.5 (HIGH), indicating a high impact on availability with low attack complexity. While not listed in CISA's KEV catalog, there is some community discussion and media coverage, though no public exploit code is readily available.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.2.0, <= 4.2.8CPE matchmatch criteria | cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:* | ||
>= 4.3.0, <= 4.3.6CPE matchmatch criteria | cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:* | ||
4.1-esvCPE matchmatch criteria | cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:* | ||
4.1-esvCPE matchmatch criteria | cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:* | ||
4.1-esvCPE matchmatch criteria | cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.