{"schemaVersion":3,"id":"USN-4335-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"thunderbird vulnerabilities\n\nMultiple security issues were discovered in Thunderbird. If a user were\ntricked in to opening a specially crafted website in a browsing context,\nan attacker could potentially exploit these to cause a denial of service,\nobtain sensitive information, bypass security restrictions, bypass\nsame-origin restrictions, conduct cross-site scripting (XSS) attacks, or\nexecute arbitrary code. (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759,\nCVE-2019-11760, CVE-2019-11761, CVE-2019-11762, CVE-2019-11763,\nCVE-2019-11764, CVE-2019-17005, CVE-2019-17008, CVE-2019-17010,\nCVE-2019-17011, CVE-2019-17012, CVE-2019-17016, CVE-2019-17017,\nCVE-2019-17022, CVE-2019-17024, CVE-2019-17026, CVE-2019-20503,\nCVE-2020-6798, CVE-2020-6800, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807,\nCVE-2020-6812, CVE-2020-6814, CVE-2020-6819, CVE-2020-6820, CVE-2020-6821,\nCVE-2020-6825)\n\nIt was discovered that NSS incorrectly handled certain memory operations.\nA remote attacker could potentially exploit this to cause a denial of\nservice, or execute arbitrary code. (CVE-2019-11745)\n\nIt was discovered that a specially crafted S/MIME message with an inner\nencryption layer could be displayed as having a valid signature in some\ncircumstances, even if the signer had no access to the encrypted message.\nAn attacker could potentially exploit this to spoof the message author.\n(CVE-2019-11755)\n\nA heap overflow was discovered in the expat library in Thunderbird. If a\nuser were tricked in to opening a specially crafted message, an attacker\ncould potentially exploit this to cause a denial of service, or execute\narbitrary code. (CVE-2019-15903)\n\nIt was discovered that Message ID calculation was based on uninitialized\ndata. An attacker could potentially exploit this to obtain sensitive\ninformation. (CVE-2020-6792)\n\nMutiple security issues were discovered in Thunderbird. If a user were\ntricked in to opening a specially crafted message, an attacker could\npotentially exploit these to cause a denial of service, obtain sensitive\ninformation, or execute arbitrary code. (CVE-2020-6793, CVE-2020-6795,\nCVE-2020-6822)\n\nIt was discovered that if a user saved passwords before Thunderbird 60 and\nthen later set a primary password, an unencrypted copy of these passwords\nwould still be accessible. A local user could exploit this to obtain\nsensitive information. (CVE-2020-6794)\n\nIt was discovered that the Devtools’ ‘Copy as cURL’ feature did not\nfully escape website-controlled data. If a user were tricked in to using\nthe ‘Copy as cURL’ feature to copy and paste a command with specially\ncrafted data in to a terminal, an attacker could potentially exploit this\nto execute arbitrary commands via command injection. (CVE-2020-6811)","dates":{"published":"2020-04-21T20:14:22.000Z","modified":"2026-04-27T15:48:45.185Z","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":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/thunderbird","purlType":"deb","versions":[{"text":"< 1:68.7.0+build1-0ubuntu0.16.04.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:68.7.0+build1-0ubuntu0.16.04.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4335-1","label":"ubuntu.com/security/notices/USN-4335-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-11745","label":"ubuntu.com/security/CVE-2019-11745","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11755","label":"ubuntu.com/security/CVE-2019-11755","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11757","label":"ubuntu.com/security/CVE-2019-11757","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11758","label":"ubuntu.com/security/CVE-2019-11758","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11759","label":"ubuntu.com/security/CVE-2019-11759","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11760","label":"ubuntu.com/security/CVE-2019-11760","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11761","label":"ubuntu.com/security/CVE-2019-11761","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11762","label":"ubuntu.com/security/CVE-2019-11762","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11763","label":"ubuntu.com/security/CVE-2019-11763","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-11764","label":"ubuntu.com/security/CVE-2019-11764","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-15903","label":"ubuntu.com/security/CVE-2019-15903","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17005","label":"ubuntu.com/security/CVE-2019-17005","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17008","label":"ubuntu.com/security/CVE-2019-17008","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17010","label":"ubuntu.com/security/CVE-2019-17010","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17011","label":"ubuntu.com/security/CVE-2019-17011","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17012","label":"ubuntu.com/security/CVE-2019-17012","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17016","label":"ubuntu.com/security/CVE-2019-17016","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17017","label":"ubuntu.com/security/CVE-2019-17017","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17022","label":"ubuntu.com/security/CVE-2019-17022","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17024","label":"ubuntu.com/security/CVE-2019-17024","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-17026","label":"ubuntu.com/security/CVE-2019-17026","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2019-20503","label":"ubuntu.com/security/CVE-2019-20503","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6792","label":"ubuntu.com/security/CVE-2020-6792","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6793","label":"ubuntu.com/security/CVE-2020-6793","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6794","label":"ubuntu.com/security/CVE-2020-6794","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6795","label":"ubuntu.com/security/CVE-2020-6795","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6798","label":"ubuntu.com/security/CVE-2020-6798","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6800","label":"ubuntu.com/security/CVE-2020-6800","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6805","label":"ubuntu.com/security/CVE-2020-6805","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6806","label":"ubuntu.com/security/CVE-2020-6806","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6807","label":"ubuntu.com/security/CVE-2020-6807","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6811","label":"ubuntu.com/security/CVE-2020-6811","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6812","label":"ubuntu.com/security/CVE-2020-6812","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6814","label":"ubuntu.com/security/CVE-2020-6814","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6819","label":"ubuntu.com/security/CVE-2020-6819","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6820","label":"ubuntu.com/security/CVE-2020-6820","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6821","label":"ubuntu.com/security/CVE-2020-6821","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6822","label":"ubuntu.com/security/CVE-2020-6822","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6825","label":"ubuntu.com/security/CVE-2020-6825","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-11745","CVE-2019-11755","CVE-2019-11757","CVE-2019-11759","CVE-2019-11760","CVE-2019-11761","CVE-2019-11762","CVE-2019-11763","CVE-2019-11764","CVE-2019-15903","CVE-2019-17005","CVE-2019-17008","CVE-2019-17010","CVE-2019-17011","CVE-2019-17012","CVE-2019-17016","CVE-2019-17017","CVE-2019-17022","CVE-2019-17024","CVE-2019-17026","CVE-2019-20503","CVE-2020-6792","CVE-2020-6793","CVE-2020-6794","CVE-2020-6795","CVE-2020-6798","CVE-2020-6800","CVE-2020-6805","CVE-2020-6806","CVE-2020-6807","CVE-2020-6811","CVE-2020-6812","CVE-2020-6814","CVE-2020-6819","CVE-2020-6820","CVE-2020-6821","CVE-2020-6822","CVE-2020-6825"],"downstream":[],"duplicates":[],"related":["CVE-2019-11745","CVE-2019-11755","CVE-2019-11757","CVE-2019-11759","CVE-2019-11760","CVE-2019-11761","CVE-2019-11762","CVE-2019-11763","CVE-2019-11764","CVE-2019-15903","CVE-2019-17005","CVE-2019-17008","CVE-2019-17010","CVE-2019-17011","CVE-2019-17012","CVE-2019-17016","CVE-2019-17017","CVE-2019-17022","CVE-2019-17024","CVE-2019-17026","CVE-2019-20503","CVE-2020-6792","CVE-2020-6793","CVE-2020-6794","CVE-2020-6795","CVE-2020-6798","CVE-2020-6800","CVE-2020-6805","CVE-2020-6806","CVE-2020-6807","CVE-2020-6811","CVE-2020-6812","CVE-2020-6814","CVE-2020-6819","CVE-2020-6820","CVE-2020-6821","CVE-2020-6822","CVE-2020-6825"]},"timeline":[{"kind":"published","date":"2020-04-21T20:14:22.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T15:48:45.185Z","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":"2026-10-20T01:36:37.172Z","stale":false,"partial":false}}