{"id":"CVE-2017-5120","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-5120","generatedAt":"2026-10-29T00:34:33.603Z","title":"Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and 61.0.3163.81 for Android, allowed a remote attacker to potentially downgrade HTTPS requests to HTTP via a crafted…","description":"Inappropriate use of www mismatch redirects in browser navigation in Google Chrome prior to 61.0.3163.79 for Mac, Windows, and Linux, and 61.0.3163.81 for Android, allowed a remote attacker to potentially downgrade HTTPS requests to HTTP via a crafted HTML page. In other words, Chrome could transmit cleartext even though the user had entered an https URL, because of a misdesigned workaround for cases where the domain name in a URL almost matches the domain name in an X.509 server certificate (but differs in the initial \"www.\" substring).","published":"2017-10-27T05:29:03.000Z","lastModified":"2026-06-17T01:20:00.000Z","status":"Modified","sourceIdentifier":"chrome-cve-admin@google.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},"cwe":[],"affected":["google/chrome","debian/debian linux","redhat/enterprise linux desktop","redhat/enterprise linux server","redhat/enterprise linux workstation"],"epss":{"score":0.01106,"percentile":0.6564,"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":"low","text":"Lower severity and a low EPSS score (1.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.debian.org/security/2017/dsa-3985","source":"chrome-cve-admin@google.com"},{"url":"http://www.securityfocus.com/bid/100610","source":"chrome-cve-admin@google.com"},{"url":"http://www.securitytracker.com/id/1039291","source":"chrome-cve-admin@google.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:2676","source":"chrome-cve-admin@google.com"},{"url":"https://chromereleases.googleblog.com/2017/09/stable-channel-update-for-desktop.html","source":"chrome-cve-admin@google.com"},{"url":"https://crbug.com/718676","source":"chrome-cve-admin@google.com"},{"url":"https://security.gentoo.org/glsa/201709-15","source":"chrome-cve-admin@google.com"},{"url":"http://www.debian.org/security/2017/dsa-3985","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/100610","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039291","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2676","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://chromereleases.googleblog.com/2017/09/stable-channel-update-for-desktop.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://crbug.com/718676","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201709-15","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-5120","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."}