{"id":"USN-8110-1","summary":"libnet-cidr-perl vulnerability","details":"Dave Rolsky discovered that Net-CIDR did not properly sanitize IP\naddresses. An attacker could possibly use this to bypass IP-based\nrestrictions.","modified":"2026-06-25T13:32:31.926301384Z","published":"2026-03-18T19:40:53Z","related":["UBUNTU-CVE-2021-4456"],"upstream":["UBUNTU-CVE-2021-4456"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8110-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4456"}],"affected":[{"package":{"name":"libnet-cidr-perl","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.17-1ubuntu0.14.04.1~esm2"}]}],"versions":["0.17-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_name":"libnet-cidr-perl","binary_version":"0.17-1ubuntu0.14.04.1~esm2"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-4456"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8110-1.json"}},{"package":{"name":"libnet-cidr-perl","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-perl?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.17-1ubuntu0.16.04.1~esm2"}]}],"versions":["0.17-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): 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