VULNERABILITY INTELLIGENCE

CVE-2021-40084

CVSS score9.8 CRITICAL

EPSS probability2.93%

CISA KEVNot currently listed

Published2021-08-25

Last modified2026-06-17

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

Description

opensysusers through 0.6 does not safely use eval on files in sysusers.d that may contain shell metacharacters. For example, it allows command execution via a crafted GECOS field whereas systemd-sysusers (a program with the same specification) does not do that.

Weakness classification

nvd@nist.gov: CWE-94

Primary references

cve@mitre.org — Exploit, Mailing List, Third Party Advisory
cve@mitre.org — Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory