CVE-2024-21820

Published Nov 13, 2024 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Description

Incorrect default permissions in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX may allow a privileged user to potentially enable escalation of privilege via local access.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX

unaffected

Version	Status	Constraints
`See references`	affected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
Debian DLA	DLA-4002-1	intel-microcode security update
EUVD	EUVD-2024-19432	Incorrect default permissions in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX may allow a privileged user to potentially enable escalation of privilege via local access.
Ubuntu USN	USN-7149-1	Intel Microcode vulnerabilities

Metrics

Attack Vector Local

Attack Complexity High

Privileges Required High

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity High

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.216% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://lists.debian.org/debian-lts-announce/2024/12/msg00024.html
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01079.html

History

Nov 3, 2025 10:30 PM Added references View changes

Type	Values Removed	Values Added
References		https://lists.debian.org/debian-lts-announce/2024/12/msg00024.html

Nov 14, 2024 8:15 PM First appearance in the feed. Affected versions updated. Affected vendors updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
First Time appeared		Intel Intel 3rd Generation Intel Xeon Scalable Processor Family Intel 4th Generation Intel Xeon Processor Scalable Family Intel 5th Generation Intel Xeon Processor Scalable Family Intel xeon D Processor
CPEs		cpe:2.3:h:intel:3rd_generation_intel_xeon_scalable_processor_family:606a6:::::::* cpe:2.3:h:intel:4th_generation_intel_xeon_processor_scalable_family:806f7:::::::* cpe:2.3:h:intel:4th_generation_intel_xeon_processor_scalable_family:806f8:::::::* cpe:2.3:h:intel:5th_generation_intel_xeon_processor_scalable_family:c06f2:::::::* cpe:2.3:h:intel:xeon_d_processor:606c1:::::::*
Vendors & Products		Intel Intel 3rd Generation Intel Xeon Scalable Processor Family Intel 4th Generation Intel Xeon Processor Scalable Family Intel 5th Generation Intel Xeon Processor Scalable Family Intel xeon D Processor
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Nov 13, 2024 8:45 PM Description updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Incorrect default permissions in some Intel(R) Xeon(R) processor memory controller configurations when using Intel(R) SGX may allow a privileged user to potentially enable escalation of privilege via local access.
Weaknesses		CWE-276
References		https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01079.html
Metrics		cvssV3_1 `{'score': 7.2, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N'}` cvssV4_0 `{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'}`

Subscriptions

Intel 3rd Generation Intel Xeon Scalable Processor Family 4th Generation Intel Xeon Processor Scalable Family 5th Generation Intel Xeon Processor Scalable Family Xeon D Processor

Weaknesses