{"id":"USN-4221-1","summary":"libpcap vulnerability","details":"It was discovered that libpcap did not properly validate PHB headers in\nsome situations. An attacker could use this to cause a denial of service\n(memory exhaustion).\n","modified":"2026-04-22T10:06:13.439550Z","published":"2019-12-11T00:17:36Z","related":["UBUNTU-CVE-2019-15165"],"upstream":["CVE-2019-15165","UBUNTU-CVE-2019-15165"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4221-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-15165"}],"affected":[{"package":{"name":"libpcap","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libpcap@1.5.3-2ubuntu0.1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-2ubuntu0.1"}]}],"versions":["1.4.0-2","1.5.1-1","1.5.2-1","1.5.3-1","1.5.3-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.5.3-2ubuntu0.1","binary_name":"libpcap0.8"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4221-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15165"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"libpcap","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libpcap@1.7.4-2ubuntu0.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.4-2ubuntu0.1"}]}],"versions":["1.7.4-1","1.7.4-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.4-2ubuntu0.1","binary_name":"libpcap0.8"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4221-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15165"}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"libpcap","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libpcap@1.8.1-6ubuntu1.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.1-6ubuntu1.18.04.1"}]}],"versions":["1.8.1-5ubuntu1","1.8.1-6ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.8.1-6ubuntu1.18.04.1","binary_name":"libpcap0.8"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4221-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2019-15165"}],"ecosystem":"Ubuntu:18.04:LTS"}}}],"schema_version":"1.7.5"}