CVE-2013-4392

Publication date 28 October 2013

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

systemd, when updating file permissions, allows local users to change the permissions and SELinux security contexts for arbitrary files via a symlink attack on unspecified files.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
systemd	13.04 raring	Not affected
	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	10.04 LTS lucid	Not in release

Notes

mdeslaur

this is likely in a systemd component we don't ship

sbeattie

it also is mitigated by hardlink protections

Patch details

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

Package	Patch details
systemd	Upstream: 08c8498 Upstream: ee9e629

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.0 · Medium

Base metrics

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

Scores

Parameter	Value
Base score	5.0 · Medium
Exploitability score	-
Impact score	-

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