{"id":"USN-4196-1","summary":"python-ecdsa vulnerabilities","details":"It was discovered that python-ecdsa incorrectly handled certain signatures.\nA remote attacker could possibly use this issue to cause python-ecdsa to\ngenerate unexpected exceptions, resulting in a denial of service.\n(CVE-2019-14853)\n\nIt was discovered that python-ecdsa incorrectly verified DER encoding in\nsignatures. A remote attacker could use this issue to perform certain\nmalleability attacks. (CVE-2019-14859)\n","modified":"2026-02-10T04:41:42Z","published":"2019-11-18T12:42:01Z","related":["UBUNTU-CVE-2019-14853","UBUNTU-CVE-2019-14859"],"upstream":["CVE-2019-14853","CVE-2019-14859","UBUNTU-CVE-2019-14853","UBUNTU-CVE-2019-14859"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4196-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-14853"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-14859"}],"affected":[{"package":{"name":"python-ecdsa","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-ecdsa@0.13-2ubuntu0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13-2ubuntu0.16.04.1"}]}],"versions":["0.13-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.13-2ubuntu0.16.04.1","binary_name":"python-ecdsa"},{"binary_version":"0.13-2ubuntu0.16.04.1","binary_name":"python3-ecdsa"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2019-14853"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2019-14859"}],"ecosystem":"Ubuntu:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4196-1.json"}},{"package":{"name":"python-ecdsa","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-ecdsa@0.13-2ubuntu0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13-2ubuntu0.18.04.1"}]}],"versions":["0.13-2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.13-2ubuntu0.18.04.1","binary_name":"python-ecdsa"},{"binary_version":"0.13-2ubuntu0.18.04.1","binary_name":"python3-ecdsa"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2019-14853"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2019-14859"}],"ecosystem":"Ubuntu:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4196-1.json"}}],"schema_version":"1.7.3"}