CVE-2023-31439

Publication date 13 June 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An issue was discovered in systemd 253. An attacker can modify the contents of past events in a sealed log file and then adjust the file such that checking the integrity shows no error, despite modifications. NOTE: the vendor reportedly sent "a reply denying that any of the finding was a security vulnerability."

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
systemd	23.04 lunar	Not affected
	22.10 kinetic	Ignored end of life, was deferred [2023-06-28]
	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	Not affected

Notes

mdeslaur

This issue was disputed by upstream systemd developers. Marking as not-affected.

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N