VDB-253687 · CVE-2023-20587 · GCVE-0-2023-20587

AMD EPYC(TM) Embedded 9003 System Management Mode access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in AMD 3rd Gen EPYC Processors, 4th Gen EPYC Processors, 1st Gen EPYC Processors, 2nd Gen EPYC Processors, EPYC(TM) Embedded 3000, EPYC(TM) Embedded 7002, EPYC(TM) Embedded 7003 and EPYC(TM) Embedded 9003. It has been rated as critical. Impacted is an unknown function of the component System Management Mode. This manipulation causes access control. This vulnerability is tracked as CVE-2023-20587. No exploit exists.

Detailsinfo

A vulnerability has been found in AMD 3rd Gen EPYC Processors, 4th Gen EPYC Processors, 1st Gen EPYC Processors, 2nd Gen EPYC Processors, EPYC(TM) Embedded 3000, EPYC(TM) Embedded 7002, EPYC(TM) Embedded 7003 and EPYC(TM) Embedded 9003 and classified as critical. Affected by this vulnerability is an unknown function of the component System Management Mode. 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. The summary by CVE is:

Improper Access Control in System Management Mode (SMM) may allow an attacker access to the SPI flash potentially leading to arbitrary code execution.

The weakness was disclosed 02/13/2024. It is possible to read the advisory at amd.com. This vulnerability is known as CVE-2023-20587 since 10/27/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

ADP CISA Base Score: 7.1
ADP CISA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
02/13/2024 +474 days 🔍
02/13/2024 +0 days 🔍
04/15/2026 +792 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-20587 (🔍)
GCVE (CVE): GCVE-0-2023-20587
GCVE (VulDB): GCVE-100-253687

Entryinfo

Created: 02/13/2024 21:36
Updated: 04/15/2026 17:37
Changes: 02/13/2024 21:36 (37), 05/08/2025 05:56 (16), 04/15/2026 17:37 (11)
Complete: 🔍
Cache ID: 216::103