CVE-2021-23993

2021-04-1300:00:00

ubuntu.com

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

31.7%

JSON

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.

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