{"id":"CVE-2018-12271","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-12271","generatedAt":"2026-10-29T00:47:25.567Z","title":"The LAContext class for Biometric (TouchID) validation allows authentication bypass by overriding the LAContext return Boolean value to be \"true\" because the kSecAccessControlUserPresence protection mechanism is not used.","description":"An issue was discovered in the com.getdropbox.Dropbox app 100.2 for iOS. The LAContext class for Biometric (TouchID) validation allows authentication bypass by overriding the LAContext return Boolean value to be \"true\" because the kSecAccessControlUserPresence protection mechanism is not used. In other words, an attacker could authenticate with an arbitrary fingerprint. NOTE: the vendor indicates that this is not an attack of interest within the context of their threat model, which excludes iOS devices on which a jailbreak has occurred","published":"2018-06-13T23:29:00.000Z","lastModified":"2026-06-17T01:37:29.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":6.4,"severity":"MEDIUM","vector":"CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-287"],"affected":["dropbox/dropbox"],"epss":{"score":0.00424,"percentile":0.36517,"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 (0.42%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://gist.github.com/tanprathan/6e8ed195a2e05b7f9d9a342dbdacb349","tags":["Issue Tracking","Third Party Advisory","Tool Signature"],"source":"cve@mitre.org"},{"url":"https://hackerone.com/reports/363544","tags":["Issue Tracking","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.dropbox.com/s/n880ob3gtvfwryu/20180609_013320.mp4?dl=0","tags":["Broken Link","Permissions Required"],"source":"cve@mitre.org"},{"url":"https://gist.github.com/tanprathan/6e8ed195a2e05b7f9d9a342dbdacb349","tags":["Issue Tracking","Third Party Advisory","Tool Signature"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://hackerone.com/reports/363544","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.dropbox.com/s/n880ob3gtvfwryu/20180609_013320.mp4?dl=0","tags":["Broken Link","Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-12271","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."}