CVE-2021-40084

Public Exploit

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.27% Top 25%
Third-Party Advisory debian.org Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.debian.org/992058 mailing list exploit third party advisory
https://github.com/artix-linux/opensysusers/releases third party advisory release notes

Frequently Asked Questions

What is the severity of CVE-2021-40084?
CVE-2021-40084 has been scored as a critical severity vulnerability.
How to fix CVE-2021-40084?
To fix CVE-2021-40084, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40084 being actively exploited in the wild?
It is possible that CVE-2021-40084 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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