CVE-2021-3917

Description

A flaw was found in the coreos-installer, where it writes the Ignition config to the target system with world-readable access permissions. This flaw allows a local attacker to have read access to potentially sensitive data. The highest threat from this vulnerability is to confidentiality.

References

Link	Tags
https://github.com/coreos/fedora-coreos-tracker/issues/889	patch third party advisory issue tracking
https://github.com/coreos/coreos-installer/commit/2a36405339c87b16ed6c76e91ad5b76638fbdb0c	third party advisory patch
https://bugzilla.redhat.com/show_bug.cgi?id=2018478	vendor advisory issue tracking
https://access.redhat.com/security/cve/CVE-2021-3917	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-3917?: CVE-2021-3917 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3917?: To fix CVE-2021-3917, 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-2021-3917 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-3917 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3917?: CVE-2021-3917 affects n/a coreos-installer.

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Description

Category

CWE-276 – Incorrect Default Permissions

References

Frequently Asked Questions