{"schemaVersion":3,"id":"USN-3477-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"firefox vulnerabilities\n\nMultiple security issues were discovered in Firefox. If a user were\ntricked in to opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, read uninitialized\nmemory, obtain sensitive information, bypass same-origin restrictions,\nbypass CSP protections, bypass mixed content blocking, spoof the\naddressbar, or execute arbitrary code. (CVE-2017-7826, CVE-2017-7827,\nCVE-2017-7828, CVE-2017-7830, CVE-2017-7831, CVE-2017-7832, CVE-2017-7833,\nCVE-2017-7834, CVE-2017-7835, CVE-2017-7837, CVE-2017-7838, CVE-2017-7842)\n\nIt was discovered that javascript: URLs pasted in to the addressbar\nwould be executed instead of being blocked in some circumstances. If a\nuser were tricked in to copying a specially crafted URL in to the\naddressbar, an attacker could potentially exploit this to conduct\ncross-site scripting (XSS) attacks. (CVE-2017-7839)\n\nIt was discovered that exported bookmarks do not strip script elements\nfrom user-supplied tags. If a user were tricked in to adding specially\ncrafted tags to bookmarks, exporting them and then opening the resulting\nHTML file, an attacker could potentially exploit this to conduct\ncross-site scripting (XSS) attacks. (CVE-2017-7840)","dates":{"published":"2017-11-16T15:08:36.000Z","modified":"2026-04-22T09:41:02.981Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 57.0+build4-0ubuntu0.14.04.4","noFixRecorded":false,"fixedIn":null},{"text":"< 57.0+build4-0ubuntu0.16.04.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 57.0+build4-0ubuntu0.14.04.4 | < 57.0+build4-0ubuntu0.16.04.5","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-3477-1","label":"ubuntu.com/security/notices/USN-3477-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-7826","label":"ubuntu.com/security/CVE-2017-7826","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7827","label":"ubuntu.com/security/CVE-2017-7827","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7828","label":"ubuntu.com/security/CVE-2017-7828","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7830","label":"ubuntu.com/security/CVE-2017-7830","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7831","label":"ubuntu.com/security/CVE-2017-7831","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7832","label":"ubuntu.com/security/CVE-2017-7832","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7833","label":"ubuntu.com/security/CVE-2017-7833","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7834","label":"ubuntu.com/security/CVE-2017-7834","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7835","label":"ubuntu.com/security/CVE-2017-7835","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7837","label":"ubuntu.com/security/CVE-2017-7837","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7838","label":"ubuntu.com/security/CVE-2017-7838","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7839","label":"ubuntu.com/security/CVE-2017-7839","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7840","label":"ubuntu.com/security/CVE-2017-7840","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2017-7842","label":"ubuntu.com/security/CVE-2017-7842","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2017-7826","CVE-2017-7827","CVE-2017-7828","CVE-2017-7830","CVE-2017-7831","CVE-2017-7832","CVE-2017-7833","CVE-2017-7834","CVE-2017-7835","CVE-2017-7837","CVE-2017-7838","CVE-2017-7839","CVE-2017-7840","CVE-2017-7842"],"downstream":[],"duplicates":[],"related":["CVE-2017-7826","CVE-2017-7827","CVE-2017-7828","CVE-2017-7830","CVE-2017-7831","CVE-2017-7832","CVE-2017-7833","CVE-2017-7834","CVE-2017-7835","CVE-2017-7837","CVE-2017-7838","CVE-2017-7839","CVE-2017-7840","CVE-2017-7842"]},"timeline":[{"kind":"published","date":"2017-11-16T15:08:36.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T09:41:02.981Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T20:59:20.912Z","stale":false,"partial":false}}