{"id":"CVE-2021-29949","aliases":["DEBIAN-CVE-2021-29949","DLA-2632-1","DSA-4897-1","EUVD-2021-16408","GHSA-mhf4-98x7-2cw4","RHSA-2021:1190","RHSA-2021:1192","RHSA-2021:1193","RHSA-2021:1201","UBUNTU-CVE-2021-29949","USN-4995-1","USN-4995-2"],"status":"published","title":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will...","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00316,"percentile":0.24787,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-427"],"published":"2021-04-22T00:00:00Z","modified":"2026-10-23T18:03:59Z","fixes":[{"ecosystem":"Debian:12","package":"thunderbird","fixed_in":["1:78.10.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"thunderbird","fixed_in":["1:78.10.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"thunderbird","fixed_in":["1:78.10.0-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"thunderbird","fixed_in":["1:78.11.0+build1-0ubuntu0.18.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"thunderbird","fixed_in":["1:78.11.0+build1-0ubuntu0.20.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.0-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:78.10.0-1~deb9u1"}]}],"versions":["1.5-4","1.5.0.2-1","1.5.0.2-2","1.5.0.2-3","1.5.0.4-1","1.5.0.4-2","1.5.0.4-3","1.5.0.5-1","1.5.0.7-1","1.5.0.7-2","1:52.4.0-1","1:52.4.0-1~deb7u1","1:52.4.0-1~deb8u1","1:52.4.0-1~deb9u1","1:52.4.0-2~exp1","1:52.5.0-1","1:52.5.0-1~deb7u1","1:52.5.0-1~deb8u1","1:52.5.0-1~deb9u1","1:52.5.2-1","1:52.5.2-1~deb7u1","1:52.5.2-2","1:52.5.2-2~deb8u1","1:52.5.2-2~deb9u1","1:52.6.0-1","1:52.6.0-1+alpha.1","1:52.6.0-1+alpha.2","1:52.6.0-1~deb7u1","1:52.6.0-1~deb8u1","1:52.6.0-1~deb9u1","1:52.7.0-1","1:52.7.0-1~deb7u1","1:52.7.0-1~deb8u1","1:52.7.0-1~deb9u1","1:52.8.0-1","1:52.8.0-1~deb7u1","1:52.8.0-1~deb8u1","1:52.8.0-1~deb9u1","1:52.9.0-1","1:52.9.1-1","1:52.9.1-1~deb8u1","1:52.9.1-1~deb9u1","1:58.0~b3-1","1:60.0-1","1:60.0-2","1:60.0-2~deb9u1","1:60.0-3","1:60.0-3~deb9u1","1:60.0~b10-1","1:60.0~b2-1","1:60.0~b3-1","1:60.0~b4-1","1:60.0~b5-1","1:60.0~b6-1","1:60.0~b9-1","1:60.0~b9-2","1:60.2.1-1","1:60.2.1-2~deb9u1","1:60.3.0-1","1:60.3.0-1~deb8u1","1:60.3.0-1~deb9u1","1:60.3.1-1","1:60.4.0-1","1:60.4.0-1~deb8u1","1:60.4.0-1~deb9u1","1:60.5.0-1","1:60.5.0-2","1:60.5.0-3","1:60.5.1-1","1:60.5.1-1~deb8u1","1:60.5.1-1~deb9u1","1:60.6.1-1","1:60.6.1-1~deb8u1","1:60.6.1-1~deb9u1","1:60.7.0-1","1:60.7.0-1~deb8u1","1:60.7.0-1~deb9u1","1:60.7.1-1","1:60.7.1-1~deb8u1","1:60.7.1-1~deb9u1","1:60.7.2-1","1:60.7.2-1~deb8u1","1:60.7.2-1~deb9u1","1:60.8.0-1","1:60.8.0-1~deb10u1","1:60.8.0-1~deb8u1","1:60.8.0-1~deb9u1","1:60.8.0-2","1:60.9.0-1","1:60.9.0-1~deb10u1","1:60.9.0-1~deb8u1","1:60.9.0-1~deb9u1","1:65.0~b1-1","1:66.0~b1-1","1:67.0~b3-1","1:68.0~b1-1","1:68.1.1-1~exp1","1:68.1.2-1~exp1","1:68.10.0-1","1:68.10.0-1~deb10u1","1:68.10.0-1~deb9u1","1:68.11.0-1","1:68.11.0-1~deb10u1","1:68.11.0-1~deb9u1","1:68.11.0-2","1:68.11.0-3","1:68.12.0-1","1:68.12.0-1~deb10u1","1:68.12.0-1~deb9u1","1:68.12.0-1~deb9u2","1:68.2.1-1","1:68.2.2-1","1:68.2.2-1~deb10u1","1:68.2.2-1~deb8u1","1:68.2.2-1~deb9u1","1:68.3.0-1","1:68.3.0-2","1:68.3.0-2~deb10u1","1:68.3.0-2~deb8u1","1:68.3.0-2~deb9u1","1:68.3.1-1","1:68.4.1-1","1:68.4.1-1~deb10u1","1:68.4.1-1~deb8u1","1:68.4.1-1~deb9u1","1:68.4.2-1","1:68.5.0-1","1:68.5.0-1~deb10u1","1:68.5.0-1~deb8u1","1:68.5.0-1~deb9u1","1:68.6.0-1","1:68.6.0-1~deb10u1","1:68.6.0-1~deb8u1","1:68.6.0-1~deb9u1","1:68.7.0-1","1:68.7.0-1~deb10u1","1:68.7.0-1~deb8u1","1:68.7.0-1~deb9u1","1:68.8.0-1","1:68.8.0-1~deb10u1","1:68.8.0-1~deb8u1","1:68.8.0-1~deb9u1","1:68.8.1-1","1:68.9.0-1","1:68.9.0-1~deb10u1","1:68.9.0-1~deb8u1","1:68.9.0-1~deb8u2","1:68.9.0-1~deb9u1","1:76.0~b1-1","1:76.0~b2-1","1:77.0~b1-1","1:77.0~b2-1","1:77.0~b3-1","1:78.0-1","1:78.0.1-1","1:78.0~b1-1","1:78.0~b2-1","1:78.1.0-1","1:78.1.1-1","1:78.2.0-1","1:78.2.1-1","1:78.2.2-1","1:78.3.1-1","1:78.3.1-2","1:78.3.1-2~deb10u1","1:78.3.1-2~deb10u2","1:78.3.1-2~deb9u1","1:78.3.2-1","1:78.3.3-1","1:78.4.0-1","1:78.4.0-1~deb10u1","1:78.4.0-1~deb9u1","1:78.4.1-1","1:78.4.2-1","1:78.4.2-1~deb10u1","1:78.4.2-1~deb9u1","1:78.5.0-1","1:78.5.0-1~deb10u1","1:78.5.0-1~deb9u1","1:78.5.1-1","1:78.5.1-1~deb10u1","1:78.5.1-1~deb9u1","1:78.6.0-1","1:78.6.0-1~deb10u1","1:78.6.0-1~deb9u1","1:78.6.1-1","1:78.7.0-1","1:78.7.0-1~deb10u1","1:78.7.0-1~deb9u1","1:78.7.1-1","1:78.8.0-1","1:78.8.0-1~deb10u1","1:78.8.0-1~deb9u1","1:78.9.0-1","1:78.9.0-1~deb10u1","1:78.9.0-1~deb9u1"],"bundled":13},{"source":"osv","ecosystem":"Debian:10","package":"thunderbird","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"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Notes","Vendor Advisory","advisory"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1682101","tags":["x_refsource_MISC","x_transferred","Permissions Required","Vendor Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29949","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-mhf4-98x7-2cw4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-29949","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1190","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1948393","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1948394","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1948395","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1190.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-23991","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23991","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23991","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-23992","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23992","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23992","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-23993","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-23993","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23993","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-29949","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1951872","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-29949","tags":["advisory","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-29950","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1951873","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-29950","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-29950","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1192","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1192.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1193","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1193.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1201","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1201.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-29949","tags":["report"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2021-13/#CVE-2021-29949","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4995-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-4995-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-23961","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23981","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23982","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23984","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23987","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23991","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23992","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23993","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23994","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23995","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23998","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-23999","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-24002","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29945","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29946","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29948","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29956","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29957","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-29967","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-29949","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-06-24T13:18:52Z","modified":"2024-08-03T22:18:03.263Z","updated_at":"2026-11-02T14:33:06.658806Z"}],"euvd":[{"id":"EUVD-2021-16408","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-06-24T13:18:52Z","modified":"2024-08-03T22:18:03Z","updated_at":"2026-11-03T03:24:43.413555Z"}],"ghsa":[{"id":"GHSA-mhf4-98x7-2cw4","title":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will...","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2022-05-24T19:06:09Z","modified":"2023-01-29T05:08:06Z","cwes":["CWE-427"],"updated_at":"2026-11-02T14:46:12.604648Z"}],"nvd":[{"id":"CVE-2021-29949","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-06-24T14:15:09.887Z","modified":"2026-06-17T03:48:29.73Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.4,"vector":"AV:L/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T14:06:54.892562Z"}],"osv":[{"id":"CVE-2021-29949","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-06-24T14:15:09.887Z","modified":"2026-03-14T10:57:23.470072Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-29949","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-06-24T14:15:09.887Z","modified":"2026-10-23T18:03:59.262027404Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"RHSA-2021:1190","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T05:39:29Z","modified":"2025-11-22T12:19:03Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1192","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T05:39:36Z","modified":"2026-06-26T10:53:45Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1193","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T05:39:43Z","modified":"2025-11-22T12:19:04Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RHSA-2021:1201","title":"Red Hat Security Advisory: thunderbird security update","status":"published","published":"2024-09-16T05:39:49Z","modified":"2025-11-22T12:19:06Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"UBUNTU-CVE-2021-29949","description":"When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird \u003c 78.9.1.","status":"published","published":"2021-04-22T14:54:00Z","modified":"2026-04-22T12:51:47.099265Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"DLA-2632-1","title":"thunderbird - security update","status":"published","published":"2021-04-22T00:00:00Z","modified":"2026-03-09T01:23:31.786314Z","updated_at":"2026-11-02T15:46:10.712745Z"},{"id":"DSA-4897-1","title":"thunderbird - security update","status":"published","published":"2021-04-22T00:00:00Z","modified":"2026-03-09T02:11:15.045459Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"USN-4995-1","title":"thunderbird vulnerabilities","description":"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","status":"published","published":"2021-06-22T16:43:02Z","modified":"2026-04-22T10:15:28.673707Z","updated_at":"2026-11-02T16:58:15.683829Z"},{"id":"USN-4995-2","title":"thunderbird vulnerabilities","description":"USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides\nthe corresponding updates for Ubuntu 18.04 LTS.\n\nOriginal advisory details:\n\n Multiple security issues were discovered in Thunderbird. If a user were\n tricked into opening a specially crafted website in a browsing context, an\n attacker could potentially exploit these to cause a denial of service,\n obtain sensitive information, spoof the UI, bypass security restrictions,\n or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,\n CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,\n CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)\n \n It was discovered that extensions could open popup windows with control\n of the window title in some circumstances. If a user were tricked into\n installing a specially crafted extension, an attacker could potentially\n exploit this to spoof a website and trick the user into providing\n credentials. (CVE-2021-23984)\n \n Multiple security issues were discovered in Thunderbird's OpenPGP\n integration. If a user were tricked into importing a specially crafted\n key in some circumstances, an attacker could potentially exploit this\n to cause a denial of service (inability to send encrypted email) or\n confuse the user. (CVE-2021-23991, CVE-2021-23992, CVE-2021-23993)\n \n A use-after-free was discovered when Responsive Design Mode was\n enabled. If a user were tricked into opening a specially crafted\n website with Responsive Design Mode enabled, an attacker could\n potentially exploit this to cause a denial of service, or execute\n arbitrary code. (CVE-2021-23995)\n \n It was discovered that Thunderbird mishandled ftp URLs with encoded\n newline characters. If a user were tricked into clicking on a specially\n crafted link, an attacker could potentially exploit this to send arbitrary\n FTP commands. (CVE-2021-24002)\n \n It was discovered that Thunderbird wrote signatures to disk and read them\n back during verification. A local attacker could potentially exploit this\n to replace the data with another signature file. (CVE-2021-29948)\n \n It was discovered that Thunderbird might load an alternative OTR\n library. If a user were tricked into copying a specially crafted\n library to one of Thunderbird's search paths, an attacker could\n potentially exploit this to execute arbitrary code. (CVE-2021-29949)\n \n It was discovered that secret keys imported into Thunderbird were\n stored unencrypted. A local attacker could potentially exploit this to\n obtain private keys. (CVE-2021-29956)\n \n It was discovered that Thunderbird did not indicate when an inline signed\n or encrypted message contained additional unprotected parts.\n (CVE-2021-29957)\n","status":"published","published":"2021-06-25T14:44:38Z","modified":"2026-04-22T10:16:05.579337Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}