CVE-2021-46873

Publication date 29 January 2023

Last updated 11 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

WireGuard, such as WireGuard 0.5.3 on Windows, does not fully account for the possibility that an adversary might be able to set a victim's system time to a future value, e.g., because unauthenticated NTP is used. This can lead to an outcome in which one static private key becomes permanently useless.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
wireguard	26.04 LTS resolute	Vulnerable, fix deferred
	25.10 questing	Ignored end of life, was deferred
	25.04 plucky	Ignored end of life, was deferred
	24.10 oracular	Ignored end of life, was deferred
	24.04 LTS noble	Vulnerable, fix deferred
	23.10 mantic	Ignored end of life, was deferred
	23.04 lunar	Ignored end of life, was deferred [2023-12-22]
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Vulnerable, fix deferred
	20.04 LTS focal	Vulnerable, fix deferred
	18.04 LTS bionic	Vulnerable, fix deferred
	16.04 LTS xenial	Vulnerable, fix deferred
	14.04 LTS trusty	Not in release

Notes

evancaville

as of 2024-02-02, doesn't appear to be an upstream fix available for this issue.

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.3 · Medium

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	Low

Scores

Parameter	Value
Base score	5.3 · Medium
Exploitability score	-
Impact score	-

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