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Alma Linux: CVE-2021-23993: Moderate: thunderbird security update (ALSA-2021-1193)

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Alma Linux: CVE-2021-23993: Moderate: thunderbird security update (ALSA-2021-1193)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
06/24/2021
Created
05/05/2022
Added
05/04/2022
Modified
05/04/2022

Description

An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, and the Thunderbird user imports the crafted key, then Thunderbird may try to use the invalid subkey, but the RNP library rejects it from being used, causing encryption to fail. This vulnerability affects Thunderbird < 78.9.1.

Solution(s)

  • alma-upgrade-thunderbird

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