{"id":"UBUNTU-CVE-2020-37127","details":"Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.","modified":"2026-05-27T16:45:07.223023830Z","published":"2026-02-05T17:16:00Z","related":["USN-8311-1"],"upstream":["CVE-2020-37127"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-37127"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-37127"},{"type":"REPORT","url":"https://www.exploit-db.com/exploits/48301"},{"type":"REPORT","url":"https://launchpad.net/ubuntu/+source/dnsmasq/2.79-1"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/dnsmasq-utils-dhcprelease-denial-of-service"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8311-1"}],"affected":[{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.68-1ubuntu0.2+esm6"}]}],"versions":["2.66-4ubuntu1","2.67-1","2.68-1","2.68-1ubuntu0.1","2.68-1ubuntu0.2","2.68-1ubuntu0.2+esm1","2.68-1ubuntu0.2+esm2","2.68-1ubuntu0.2+esm3","2.68-1ubuntu0.2+esm5"],"ecosystem_specific":{"priority_reason":"Denial of service in command line tool","binaries":[{"binary_version":"2.68-1ubuntu0.2+esm6","binary_name":"dnsmasq"},{"binary_version":"2.68-1ubuntu0.2+esm6","binary_name":"dnsmasq-base"},{"binary_name":"dnsmasq-utils","binary_version":"2.68-1ubuntu0.2+esm6"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37127.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.90-0ubuntu0.18.04.1+esm1"}]}],"versions":["2.78-1","2.78-3","2.79-1","2.79-1ubuntu0.2","2.79-1ubuntu0.3","2.79-1ubuntu0.4","2.79-1ubuntu0.5","2.79-1ubuntu0.6","2.79-1ubuntu0.7"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","priority_reason":"Denial of service in command line tool","binaries":[{"binary_name":"dnsmasq","binary_version":"2.90-0ubuntu0.18.04.1+esm1"},{"binary_version":"2.90-0ubuntu0.18.04.1+esm1","binary_name":"dnsmasq-base"},{"binary_version":"2.90-0ubuntu0.18.04.1+esm1","binary_name":"dnsmasq-base-lua"},{"binary_name":"dnsmasq-utils","binary_version":"2.90-0ubuntu0.18.04.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37127.json"}},{"package":{"name":"dnsmasq","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/dnsmasq?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.90-0ubuntu0.22.04.1"}]}],"versions":["2.85-1ubuntu2","2.86-1.1","2.86-1.1ubuntu0.1","2.86-1.1ubuntu0.2","2.86-1.1ubuntu0.3","2.86-1.1ubuntu0.4","2.86-1.1ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_version":"2.90-0ubuntu0.22.04.1","binary_name":"dnsmasq"},{"binary_name":"dnsmasq-base","binary_version":"2.90-0ubuntu0.22.04.1"},{"binary_name":"dnsmasq-base-lua","binary_version":"2.90-0ubuntu0.22.04.1"},{"binary_name":"dnsmasq-utils","binary_version":"2.90-0ubuntu0.22.04.1"}],"availability":"No subscription required","priority_reason":"Denial of service in command line tool"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-37127.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"low"}]}