{"id":"USN-3840-1","summary":"openssl, openssl1.0 vulnerabilities","details":"Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An\nattacker could possibly use this issue to perform a timing side-channel\nattack and recover private DSA keys. (CVE-2018-0734)\n\nSamuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An\nattacker could possibly use this issue to perform a timing side-channel\nattack and recover private ECDSA keys. This issue only affected Ubuntu\n18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)\n\nBilly Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri,\nand Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading\n(SMT) architectures are vulnerable to side-channel leakage. This issue is\nknown as \"PortSmash\". An attacker could possibly use this issue to perform\na timing side-channel attack and recover private keys. (CVE-2018-5407)\n","modified":"2026-02-10T04:41:27Z","published":"2018-12-06T17:43:06Z","related":["UBUNTU-CVE-2018-0734","UBUNTU-CVE-2018-0735","UBUNTU-CVE-2018-5407"],"upstream":["CVE-2018-0734","CVE-2018-0735","CVE-2018-5407","UBUNTU-CVE-2018-0734","UBUNTU-CVE-2018-0735","UBUNTU-CVE-2018-5407"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3840-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-0734"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-0735"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-5407"}],"affected":[{"package":{"name":"openssl","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.27?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.1f-1ubuntu2.27"}]}],"versions":["1.0.1e-3ubuntu1","1.0.1e-4ubuntu1","1.0.1e-4ubuntu2","1.0.1e-4ubuntu3","1.0.1e-4ubuntu4","1.0.1f-1ubuntu1","1.0.1f-1ubuntu2","1.0.1f-1ubuntu2.1","1.0.1f-1ubuntu2.2","1.0.1f-1ubuntu2.3","1.0.1f-1ubuntu2.4","1.0.1f-1ubuntu2.5","1.0.1f-1ubuntu2.7","1.0.1f-1ubuntu2.8","1.0.1f-1ubuntu2.11","1.0.1f-1ubuntu2.12","1.0.1f-1ubuntu2.15","1.0.1f-1ubuntu2.16","1.0.1f-1ubuntu2.17","1.0.1f-1ubuntu2.18","1.0.1f-1ubuntu2.19","1.0.1f-1ubuntu2.20","1.0.1f-1ubuntu2.21","1.0.1f-1ubuntu2.22","1.0.1f-1ubuntu2.23","1.0.1f-1ubuntu2.24","1.0.1f-1ubuntu2.25","1.0.1f-1ubuntu2.26"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssl-dev","binary_version":"1.0.1f-1ubuntu2.27"},{"binary_name":"libssl1.0.0","binary_version":"1.0.1f-1ubuntu2.27"},{"binary_name":"openssl","binary_version":"1.0.1f-1ubuntu2.27"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3840-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0734"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-5407"}],"ecosystem":"Ubuntu:14.04:LTS"}}},{"package":{"name":"openssl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.14?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2g-1ubuntu4.14"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssl-dev","binary_version":"1.0.2g-1ubuntu4.14"},{"binary_name":"libssl1.0.0","binary_version":"1.0.2g-1ubuntu4.14"},{"binary_name":"openssl","binary_version":"1.0.2g-1ubuntu4.14"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3840-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0734"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-5407"}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"openssl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssl@1.1.0g-2ubuntu4.3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0g-2ubuntu4.3"}]}],"versions":["1.0.2g-1ubuntu13","1.0.2g-1ubuntu14","1.0.2n-1ubuntu1","1.1.0g-2ubuntu1","1.1.0g-2ubuntu2","1.1.0g-2ubuntu3","1.1.0g-2ubuntu4","1.1.0g-2ubuntu4.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssl-dev","binary_version":"1.1.0g-2ubuntu4.3"},{"binary_name":"libssl1.1","binary_version":"1.1.0g-2ubuntu4.3"},{"binary_name":"openssl","binary_version":"1.1.0g-2ubuntu4.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3840-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0734"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0735"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-5407"}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"openssl1.0","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openssl1.0@1.0.2n-1ubuntu5.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2n-1ubuntu5.2"}]}],"versions":["1.0.2n-1ubuntu2","1.0.2n-1ubuntu3","1.0.2n-1ubuntu4","1.0.2n-1ubuntu5","1.0.2n-1ubuntu5.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssl1.0-dev","binary_version":"1.0.2n-1ubuntu5.2"},{"binary_name":"libssl1.0.0","binary_version":"1.0.2n-1ubuntu5.2"},{"binary_name":"openssl1.0","binary_version":"1.0.2n-1ubuntu5.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3840-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0734"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-0735"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2018-5407"}],"ecosystem":"Ubuntu:18.04:LTS"}}}],"schema_version":"1.7.3"}