{"id":"USN-4202-2","aliases":[],"status":"published","title":"thunderbird regression","description":"USN-4202-1 fixed vulnerabilities in Thunderbird. After upgrading, Thunderbird\ncreated a new profile for some users. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that a specially crafted S/MIME message with an inner\n encryption layer could be displayed as having a valid signature in some\n circumstances, even if the signer had no access to the encrypted message.\n An attacker could potentially exploit this to spoof the message author.\n (CVE-2019-11755)\n \n Multiple security issues were discovered in Thunderbird. If a user were\n tricked in to opening a specially crafted website in a browsing context,\n an attacker could potentially exploit these to cause a denial of service,\n bypass security restrictions, bypass same-origin restrictions, conduct\n cross-site scripting (XSS) attacks, or execute arbitrary code.\n (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760,\n CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764)\n \n A heap overflow was discovered in the expat library in Thunderbird. If a\n user were tricked in to opening a specially crafted message, an attacker\n could potentially exploit this to cause a denial of service, or execute\n arbitrary code. (CVE-2019-15903)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2019-12-10T20:33:32Z","modified":"2026-04-22T09:49:22Z","fixes":[{"ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","fixed_in":["1:68.2.2+build1-0ubuntu0.18.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:68.2.2+build1-0ubuntu0.18.04.1"}]}],"versions":["1:52.4.0+build1-0ubuntu2","1:52.6.0+build1-0ubuntu1","1:52.7.0+build1-0ubuntu1","1:52.8.0+build1-0ubuntu0.18.04.1","1:52.9.1+build3-0ubuntu0.18.04.1","1:60.2.1+build1-0ubuntu0.18.04.2","1:60.4.0+build2-0ubuntu0.18.04.1","1:60.5.1+build2-0ubuntu0.18.04.1","1:60.6.1+build2-0ubuntu0.18.04.1","1:60.7.0+build1-0ubuntu0.18.04.1","1:60.7.1+build1-0ubuntu0.18.04.1","1:60.7.2+build2-0ubuntu0.18.04.1","1:60.8.0+build1-0ubuntu0.18.04.1","1:60.9.0+build1-0ubuntu0.18.04.1","1:68.2.1+build1-0ubuntu0.18.04.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-4202-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/1854150","tags":["report"]}],"sources":{"osv":[{"id":"USN-4202-2","title":"thunderbird regression","description":"USN-4202-1 fixed vulnerabilities in Thunderbird. After upgrading, Thunderbird\ncreated a new profile for some users. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that a specially crafted S/MIME message with an inner\n encryption layer could be displayed as having a valid signature in some\n circumstances, even if the signer had no access to the encrypted message.\n An attacker could potentially exploit this to spoof the message author.\n (CVE-2019-11755)\n \n Multiple security issues were discovered in Thunderbird. If a user were\n tricked in to opening a specially crafted website in a browsing context,\n an attacker could potentially exploit these to cause a denial of service,\n bypass security restrictions, bypass same-origin restrictions, conduct\n cross-site scripting (XSS) attacks, or execute arbitrary code.\n (CVE-2019-11757, CVE-2019-11758, CVE-2019-11759, CVE-2019-11760,\n CVE-2019-11761, CVE-2019-11762, CVE-2019-11763, CVE-2019-11764)\n \n A heap overflow was discovered in the expat library in Thunderbird. If a\n user were tricked in to opening a specially crafted message, an attacker\n could potentially exploit this to cause a denial of service, or execute\n arbitrary code. (CVE-2019-15903)\n","status":"published","published":"2019-12-10T20:33:32Z","modified":"2026-04-22T09:49:22.474981Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}