CVE-2022-3675

Fedora CoreOS supports setting a GRUB bootloader password using a Butane config. When this feature is enabled, GRUB requires a password to access the GRUB command-line, modify kernel command-line arguments, or boot non-default OSTree deployments. Recent Fedora CoreOS releases have a misconfiguration which allows booting non-default OSTree deployments without entering a password. This allows someone with access to the GRUB menu to boot into an older version of Fedora CoreOS, reverting any security fixes that have recently been applied to the machine. A password is still required to modify kernel command-line arguments and to access the GRUB command line.

CVSS v3.0 5.5 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://docs.fedoraproject.org/en-US/fedora-coreos/grub-password/	Vendor Advisory
https://lists.fedoraproject.org/archives/list/coreos-status@lists.fedoraproject.org/thread/NHUCNH5Y4UH5DPUCXISYXXVA563TLFEJ/	Mailing List Vendor Advisory
https://github.com/coreos/fedora-coreos-tracker/issues/1333	Issue Tracking Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:redhat:fedora_coreos:*:*:*:*:*:*:*:*

Information

Published : 2022-11-03 11:15

Updated : 2023-03-01 10:04

NVD link : CVE-2022-3675

Mitre link : CVE-2022-3675

JSON object : View

CWE

CWE-862

Missing Authorization

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Products Affected

redhat

fedora_coreos

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