{"id":"CVE-2018-5407","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-5407","generatedAt":"2026-10-29T03:57:53.735Z","title":"Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.","description":"Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.","published":"2018-11-15T21:29:00.000Z","lastModified":"2026-10-08T22:16:47.000Z","status":"Modified","sourceIdentifier":"cret@cert.org","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200","CWE-203"],"affected":["canonical/ubuntu linux","debian/debian linux","nodejs/node.js","openssl/openssl","tenable/nessus","oracle/api gateway","oracle/application server","oracle/enterprise manager base platform","oracle/enterprise manager ops center","oracle/mysql enterprise backup","oracle/peoplesoft enterprise peopletools","oracle/primavera p6 enterprise project portfolio management","oracle/tuxedo","oracle/vm virtualbox","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux server aus","redhat/enterprise linux server eus","redhat/enterprise linux server tus","redhat/enterprise linux workstation"],"epss":{"score":0.03418,"percentile":0.88852,"date":"2026-10-28","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2018-11-02","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":45785,"kind":"exploit","title":"Intel (Skylake / Kaby Lake) - 'PortSmash' CPU SMT Side-Channel","url":"https://www.exploit-db.com/exploits/45785","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/hardware/local/45785.md","file":"exploits/hardware/local/45785.md","published":"2018-11-02","added":"2018-11-05","updated":"2018-11-05","author":"Billy Brumley","type":"local","platform":"hardware","port":null,"verified":false,"codes":["CVE-2018-5407"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://github.com/bbbrumley/portsmash/tree/e3e7447ba04e1a8a5637cabadf3403faf94f7a56"}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 3.4%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/105897","tags":["Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0483","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0651","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:0652","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:2125","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3929","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3931","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3932","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3933","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://access.redhat.com/errata/RHSA-2019:3935","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://eprint.iacr.org/2018/1060.pdf","tags":["Technical Description","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://github.com/bbbrumley/portsmash","tags":["Exploit","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html","tags":["Mailing List","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://security.gentoo.org/glsa/201903-10","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://security.netapp.com/advisory/ntap-20181126-0001/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://support.f5.com/csp/article/K49711130?utm_source=f5support&amp%3Butm_medium=RSS","source":"cret@cert.org"},{"url":"https://usn.ubuntu.com/3840-1/","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.debian.org/security/2018/dsa-4348","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.debian.org/security/2018/dsa-4355","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.exploit-db.com/exploits/45785/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cret@cert.org"},{"url":"https://www.oracle.com/security-alerts/cpuapr2020.html","tags":["Patch","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.oracle.com/security-alerts/cpujan2020.html","tags":["Patch","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["Patch","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html","tags":["Patch","Vendor Advisory"],"source":"cret@cert.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html","tags":["Patch","Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.tenable.com/security/tns-2018-16","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"https://www.tenable.com/security/tns-2018-17","tags":["Third Party Advisory"],"source":"cret@cert.org"},{"url":"http://www.securityfocus.com/bid/105897","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0483","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0651","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:0652","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:2125","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3929","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3931","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3932","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3933","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2019:3935","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://eprint.iacr.org/2018/1060.pdf","tags":["Technical Description","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/bbbrumley/portsmash","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201903-10","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20181126-0001/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K49711130?utm_source=f5support&amp%3Butm_medium=RSS","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://usn.ubuntu.com/3840-1/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2018/dsa-4348","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2018/dsa-4355","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/45785/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuapr2020.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpujan2020.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2018-16","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2018-17","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-5407","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."}