CVE-2020-21583

Publication date 22 August 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

An issue was discovered in hwclock.13-v2.27 allows attackers to gain escalated privlidges or execute arbitrary commands via the path parameter when setting the date.

Read the notes from the security team

Why is this CVE low priority?

Non-default and improbable configuration

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
util-linux	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Vulnerable

Notes

mdeslaur

This is only an issue when hwclock was modified by the administrator to be setuid root, which should never be done. Ubuntu packages are not shipped with the setuid bit set. To prevent misconfiguration, version 2.27 now prevent it from being run setuid.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
util-linux	Upstream: 687cc5d

Severity score breakdown

Parameter	Value
Base score	6.7 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H