QID 198424

Usn-4995-1 fixed vulnerabilities in thunderbird multiple security issues were discovered in thunderbird multiple security issues were discovered in thunderbird's openpgp integration a use-after-free was discovered when responsive design mode was enabled

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

this update provides the corresponding updates for ubuntu 18.04 lts.
If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, spoof the ui, bypass security restrictions, or execute arbitrary code. (
Cve-2021-23961, cve-2021-23981, cve-2021-23982, cve-2021-23987, cve-2021-23994, cve-2021-23998, cve-2021-23999, cve-2021-29945, cve-2021-29946, cve-2021-29967) if a user were tricked into importing a specially crafted key in some circumstances, an attacker could potentially exploit this to cause a denial of service (inability to send encrypted email) or confuse the user. (
Cve-2021-23991, cve-2021-23992, cve-2021-23993) if a user were tricked into opening a specially crafted website with responsive design mode enabled, an attacker could potentially exploit this to cause a denial of service, or execute arbitrary code. (
Cve-2021-23995)