{"id":"CVE-2018-0737","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-0737","generatedAt":"2026-10-28T22:09:12.900Z","title":"The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack.","description":"The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).","published":"2018-04-16T18:29:00.000Z","lastModified":"2026-10-15T18:17:06.000Z","status":"Modified","sourceIdentifier":"openssl-security@openssl.org","cvss":{"version":"3.0","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-327"],"affected":["openssl/openssl","canonical/ubuntu linux"],"epss":{"score":0.11597,"percentile":0.96018,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 11.6%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","source":"openssl-security@openssl.org"},{"url":"http://www.securityfocus.com/bid/103766","tags":["Third Party Advisory","VDB Entry"],"source":"openssl-security@openssl.org"},{"url":"http://www.securitytracker.com/id/1040685","tags":["Third Party Advisory","VDB Entry"],"source":"openssl-security@openssl.org"},{"url":"https://access.redhat.com/errata/RHSA-2018:3221","source":"openssl-security@openssl.org"},{"url":"https://access.redhat.com/errata/RHSA-2018:3505","source":"openssl-security@openssl.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3932","source":"openssl-security@openssl.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3933","source":"openssl-security@openssl.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3935","source":"openssl-security@openssl.org"},{"url":"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=349a41da1ad88ad87825414752a8ff5fdd6a6c3f","source":"openssl-security@openssl.org"},{"url":"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6939eab03a6e23d2bd2c3f5e34fe1d48e542e787","source":"openssl-security@openssl.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html","source":"openssl-security@openssl.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/","source":"openssl-security@openssl.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/","source":"openssl-security@openssl.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/","source":"openssl-security@openssl.org"},{"url":"https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/","source":"openssl-security@openssl.org"},{"url":"https://security.gentoo.org/glsa/201811-21","source":"openssl-security@openssl.org"},{"url":"https://security.netapp.com/advisory/ntap-20180726-0003/","source":"openssl-security@openssl.org"},{"url":"https://securityadvisories.paloaltonetworks.com/Home/Detail/133","source":"openssl-security@openssl.org"},{"url":"https://usn.ubuntu.com/3628-1/","tags":["Third Party Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://usn.ubuntu.com/3628-2/","tags":["Third Party Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://usn.ubuntu.com/3692-1/","source":"openssl-security@openssl.org"},{"url":"https://usn.ubuntu.com/3692-2/","source":"openssl-security@openssl.org"},{"url":"https://www.debian.org/security/2018/dsa-4348","source":"openssl-security@openssl.org"},{"url":"https://www.debian.org/security/2018/dsa-4355","source":"openssl-security@openssl.org"},{"url":"https://www.openssl.org/news/secadv/20180416.txt","tags":["Vendor Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com/security-alerts/cpuapr2020.html","source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html","source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html","source":"openssl-security@openssl.org"},{"url":"https://www.tenable.com/security/tns-2018-12","source":"openssl-security@openssl.org"},{"url":"https://www.tenable.com/security/tns-2018-13","source":"openssl-security@openssl.org"},{"url":"https://www.tenable.com/security/tns-2018-14","source":"openssl-security@openssl.org"},{"url":"https://www.tenable.com/security/tns-2018-17","source":"openssl-security@openssl.org"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/103766","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1040685","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2018:3221","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2018:3505","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3932","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3933","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3935","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=349a41da1ad88ad87825414752a8ff5fdd6a6c3f","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6939eab03a6e23d2bd2c3f5e34fe1d48e542e787","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201811-21","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20180726-0003/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://securityadvisories.paloaltonetworks.com/Home/Detail/133","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3628-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3628-2/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3692-1/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3692-2/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2018/dsa-4348","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2018/dsa-4355","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openssl.org/news/secadv/20180416.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-0737","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}