CVE-2021-29950

Publication date 22 April 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task. If the task runs into a failure, the secret key may remain in memory in its unprotected state. This vulnerability affects Thunderbird < 78.8.1.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
thunderbird	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Fixed 1:78.8.1+build1-0ubuntu0.20.10.1
	20.04 LTS focal	Fixed 1:78.8.1+build1-0ubuntu0.20.04.1
	18.04 LTS bionic	Fixed 1:78.8.1+build1-0ubuntu0.18.04.1
	16.04 LTS xenial	Ignored end of standard support, was needs-triage
	14.04 LTS trusty	Not in release

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-4936-1
Thunderbird vulnerabilities
6 May 2021