{"id":"USN-4504-1","summary":"openssl, openssl1.0 vulnerabilities","details":"Robert Merget, Marcus Brinkmann, Nimrod Aviram, and Juraj Somorovsky\ndiscovered that certain Diffie-Hellman ciphersuites in the TLS\nspecification and implemented by OpenSSL contained a flaw. A remote\nattacker could possibly use this issue to eavesdrop on encrypted\ncommunications. This was fixed in this update by removing the insecure\nciphersuites from OpenSSL. (CVE-2020-1968)\n\nCesar Pereida García, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin,\nAlejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL\nincorrectly handled ECDSA signatures. An attacker could possibly use this\nissue to perform a timing side-channel attack and recover private ECDSA\nkeys. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1547)\n\nGuido Vranken discovered that OpenSSL incorrectly performed the x86_64\nMontgomery squaring procedure. While unlikely, a remote attacker could\npossibly use this issue to recover private keys. This issue only affected\nUbuntu 18.04 LTS. (CVE-2019-1551)\n\nBernd Edlinger discovered that OpenSSL incorrectly handled certain\ndecryption functions. In certain scenarios, a remote attacker could\npossibly use this issue to perform a padding oracle attack and decrypt\ntraffic. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1563)\n\n","modified":"2026-04-27T15:48:48.461128707Z","published":"2020-09-16T13:58:04Z","related":["UBUNTU-CVE-2019-1547","UBUNTU-CVE-2019-1551","UBUNTU-CVE-2019-1563","UBUNTU-CVE-2020-1968"],"upstream":["CVE-2019-1547","CVE-2019-1551","CVE-2019-1563","CVE-2020-1968","UBUNTU-CVE-2019-1547","UBUNTU-CVE-2019-1551","UBUNTU-CVE-2019-1563","UBUNTU-CVE-2020-1968"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4504-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-1547"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-1551"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-1563"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-1968"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.17?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.17"}]}],"versions":["1.0.2d-0ubuntu1","1.0.2d-0ubuntu2","1.0.2e-1ubuntu1","1.0.2f-2ubuntu1","1.0.2g-1ubuntu2","1.0.2g-1ubuntu3","1.0.2g-1ubuntu4","1.0.2g-1ubuntu4.1","1.0.2g-1ubuntu4.2","1.0.2g-1ubuntu4.4","1.0.2g-1ubuntu4.5","1.0.2g-1ubuntu4.6","1.0.2g-1ubuntu4.8","1.0.2g-1ubuntu4.9","1.0.2g-1ubuntu4.10","1.0.2g-1ubuntu4.11","1.0.2g-1ubuntu4.12","1.0.2g-1ubuntu4.13","1.0.2g-1ubuntu4.14","1.0.2g-1ubuntu4.15","1.0.2g-1ubuntu4.16"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.0.2g-1ubuntu4.17","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2g-1ubuntu4.17","binary_name":"openssl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4504-1.json","cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"id":"CVE-2020-1968","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]}]}}},{"package":{"name":"openssl1.0","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssl1.0@1.0.2n-1ubuntu5.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2n-1ubuntu5.4"}]}],"versions":["1.0.2n-1ubuntu2","1.0.2n-1ubuntu3","1.0.2n-1ubuntu4","1.0.2n-1ubuntu5","1.0.2n-1ubuntu5.1","1.0.2n-1ubuntu5.2","1.0.2n-1ubuntu5.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.0.2n-1ubuntu5.4","binary_name":"libssl1.0.0"},{"binary_version":"1.0.2n-1ubuntu5.4","binary_name":"openssl1.0"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4504-1.json","cves_map":{"ecosystem":"Ubuntu:18.04:LTS","cves":[{"id":"CVE-2019-1547","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2019-1551","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2019-1563","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2020-1968","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}]}]}}}],"schema_version":"1.7.5"}