CVE-2021-23991

2021-04-1300:00:00

ubuntu.com

6.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

4 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:P/A:N

0.002 Low

EPSS

Percentile

56.4%

JSON

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchthunderbird< 1:78.11.0+build1-0ubuntu0.18.04.2UNKNOWN
ubuntu20.04noarchthunderbird< 1:78.11.0+build1-0ubuntu0.20.04.2UNKNOWN
ubuntu20.10noarchthunderbird< 1:78.11.0+build1-0ubuntu0.20.10.2UNKNOWN
ubuntu21.04noarchthunderbird< 1:78.11.0+build1-0ubuntu0.21.04.2UNKNOWN
ubuntu21.10noarchthunderbird< 1:78.11.0+build1-0ubuntu2UNKNOWN
ubuntu22.04noarchthunderbird< 1:78.11.0+build1-0ubuntu2UNKNOWN
ubuntu22.10noarchthunderbird< 1:78.11.0+build1-0ubuntu2UNKNOWN
ubuntu23.04noarchthunderbird< 1:78.11.0+build1-0ubuntu2UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu0.18.04.2	UNKNOWN
ubuntu	20.04	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu0.20.04.2	UNKNOWN
ubuntu	20.10	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu0.20.10.2	UNKNOWN
ubuntu	21.04	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu0.21.04.2	UNKNOWN
ubuntu	21.10	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu2	UNKNOWN
ubuntu	22.04	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu2	UNKNOWN
ubuntu	22.10	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu2	UNKNOWN
ubuntu	23.04	noarch	thunderbird	< 1:78.11.0+build1-0ubuntu2	UNKNOWN