CVE-2021-23991
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Mozilla Thunderbird
PublishedJun 24, 2021
First seenJun 24, 2021
How to fix
Update
- mozilla thunderbird78.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla thunderbird | v < 78.9.1 | 78.9.1 |
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