Fedora CoreOS GRUB access control

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Fedora CoreOS. This issue affects some unknown processing of the component GRUB. Executing a manipulation can lead to access control. This vulnerability is registered as CVE-2022-3675. The physical device can be targeted for the attack. No exploit is available.

Detailsinfo

A vulnerability was found in Fedora CoreOS (affected version unknown). It has been declared as critical. This vulnerability affects an unknown functionality of the component GRUB. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published 11/04/2022 as 1333. The advisory is shared for download at github.com. This vulnerability was named CVE-2022-3675 since 10/24/2022. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 2.6
CNA Vector (Elastic): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Yes
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/24/2022 🔍
11/04/2022 +11 days 🔍
11/04/2022 +0 days 🔍
12/04/2022 +30 days 🔍

Sourcesinfo

Advisory: 1333
Status: Confirmed

CVE: CVE-2022-3675 (🔍)
GCVE (CVE): GCVE-0-2022-3675
GCVE (VulDB): GCVE-100-212920

Entryinfo

Created: 11/04/2022 07:11
Updated: 12/04/2022 13:08
Changes: 11/04/2022 07:11 (48), 12/04/2022 13:08 (12)
Complete: 🔍
Cache ID: 216::103

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