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Ubuntu: (Multiple Advisories) (CVE-2021-23991): Thunderbird vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-23991): Thunderbird vulnerabilities

Severity
4
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:N)
Published
04/15/2021
Created
06/25/2021
Added
06/23/2021
Modified
03/22/2023

Description

If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.

Solution(s)

  • ubuntu-upgrade-thunderbird

References

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