{"id":"USN-4995-1","summary":"thunderbird vulnerabilities","details":"Multiple security issues were discovered in Thunderbird. If a user were\ntricked into opening a specially crafted website in a browsing context, an\nattacker could potentially exploit these to cause a denial of service,\nobtain sensitive information, spoof the UI, bypass security restrictions,\nor execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,\nCVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,\nCVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)\n\nIt was discovered that extensions could open popup windows with control\nof the window title in some circumstances. If a user were tricked into\ninstalling a specially crafted extension, an attacker could potentially\nexploit this to spoof a website and trick the user into providing\ncredentials. (CVE-2021-23984)\n\nMultiple security issues were discovered in Thunderbird's OpenPGP\nintegration. If a user were tricked into importing a specially crafted\nkey in some circumstances, an attacker could potentially exploit this\nto cause a denial of service (inability to send encrypted email) or\nconfuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)\n\nA use-after-free was discovered when Responsive Design Mode was\nenabled. If a user were tricked into opening a specially crafted\nwebsite with Responsive Design Mode enabled, an attacker could\npotentially exploit this to cause a denial of service, or execute\narbitrary code. (CVE-2021-23995)\n\nIt was discovered that Thunderbird mishandled ftp URLs with encoded\nnewline characters. If a user were tricked into clicking on a specially\ncrafted link, an attacker could potentially exploit this to send arbitrary\nFTP commands. (CVE-2021-24002)\n\nIt was discovered that Thunderbird wrote signatures to disk and read them\nback during verification. A local attacker could potentially exploit this\nto replace the data with another signature file. (CVE-2021-29948)\n\nIt was discovered that Thunderbird might load an alternative OTR\nlibrary. If a user were tricked into copying a specially crafted\nlibrary to one of Thunderbird's search paths, an attacker could\npotentially exploit this to execute arbitrary code. (CVE-2021-29949)\n\nIt was discovered that secret keys imported into Thunderbird were\nstored unencrypted. A local attacker could potentially exploit this to\nobtain private keys. (CVE-2021-29956)\n\nIt was discovered that Thunderbird did not indicate when an inline signed\nor encrypted message contained additional unprotected parts.\n(CVE-2021-29957)\n","modified":"2026-02-10T04:42:14Z","published":"2021-06-22T16:43:02Z","related":["UBUNTU-CVE-2021-23961","UBUNTU-CVE-2021-23981","UBUNTU-CVE-2021-23982","UBUNTU-CVE-2021-23984","UBUNTU-CVE-2021-23987","UBUNTU-CVE-2021-23991","UBUNTU-CVE-2021-23992","UBUNTU-CVE-2021-23993","UBUNTU-CVE-2021-23994","UBUNTU-CVE-2021-23995","UBUNTU-CVE-2021-23998","UBUNTU-CVE-2021-23999","UBUNTU-CVE-2021-24002","UBUNTU-CVE-2021-29945","UBUNTU-CVE-2021-29946","UBUNTU-CVE-2021-29948","UBUNTU-CVE-2021-29949","UBUNTU-CVE-2021-29956","UBUNTU-CVE-2021-29957","UBUNTU-CVE-2021-29967"],"upstream":["CVE-2021-23961","CVE-2021-23981","CVE-2021-23982","CVE-2021-23984","CVE-2021-23987","CVE-2021-23991","CVE-2021-23992","CVE-2021-23993","CVE-2021-23994","CVE-2021-23995","CVE-2021-23998","CVE-2021-23999","CVE-2021-24002","CVE-2021-29945","CVE-2021-29946","CVE-2021-29948","CVE-2021-29949","CVE-2021-29956","CVE-2021-29957","CVE-2021-29967","UBUNTU-CVE-2021-23961","UBUNTU-CVE-2021-23981","UBUNTU-CVE-2021-23982","UBUNTU-CVE-2021-23984","UBUNTU-CVE-2021-23987","UBUNTU-CVE-2021-23991","UBUNTU-CVE-2021-23992","UBUNTU-CVE-2021-23993","UBUNTU-CVE-2021-23994","UBUNTU-CVE-2021-23995","UBUNTU-CVE-2021-23998","UBUNTU-CVE-2021-23999","UBUNTU-CVE-2021-24002","UBUNTU-CVE-2021-29945","UBUNTU-CVE-2021-29946","UBUNTU-CVE-2021-29948","UBUNTU-CVE-2021-29949","UBUNTU-CVE-2021-29956","UBUNTU-CVE-2021-29957","UBUNTU-CVE-2021-29967"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4995-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23961"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23981"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23982"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23984"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23987"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23991"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23992"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23993"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23994"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23995"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23998"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23999"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-24002"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29945"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29946"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29948"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29949"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29956"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29957"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-29967"}],"affected":[{"package":{"name":"thunderbird","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/thunderbird@1:78.11.0+build1-0ubuntu0.20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.11.0+build1-0ubuntu0.20.04.2"}]}],"versions":["1:68.1.2+build1-0ubuntu1","1:68.1.2+build1-0ubuntu2","1:68.2.1+build1-0ubuntu1","1:68.2.2+build1-0ubuntu1","1:68.3.0+build2-0ubuntu1","1:68.3.1+build1-0ubuntu2","1:68.4.1+build1-0ubuntu1","1:68.4.2+build2-0ubuntu1","1:68.5.0+build1-0ubuntu1","1:68.6.0+build2-0ubuntu1","1:68.7.0+build1-0ubuntu1","1:68.7.0+build1-0ubuntu2","1:68.8.0+build2-0ubuntu0.20.04.2","1:68.10.0+build1-0ubuntu0.20.04.1","1:78.7.1+build1-0ubuntu0.20.04.1","1:78.8.1+build1-0ubuntu0.20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"thunderbird"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"thunderbird-dev"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"thunderbird-gnome-support"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"thunderbird-mozsymbols"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"xul-ext-calendar-timezones"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"xul-ext-gdata-provider"},{"binary_version":"1:78.11.0+build1-0ubuntu0.20.04.2","binary_name":"xul-ext-lightning"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4995-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23961"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23981"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23982"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23984"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23987"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23991"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23992"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23993"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23994"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23995"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23998"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-23999"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-24002"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29945"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29946"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2021-29948"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2021-29949"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29956"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29957"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-29967"}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}