vulnerability
Red Hat: CVE-2021-23991: CVE-2021-23991 Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:H/Au:N/C:P/I:P/A:N) | Apr 14, 2021 | Apr 15, 2021 | Jul 9, 2025 |
Severity
4
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:N)
Published
Apr 14, 2021
Added
Apr 15, 2021
Modified
Jul 9, 2025
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
Solution(s)
no-fix-redhat-rpm-packageredhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource
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