VDB-311922 · CVE-2023-20599 · EUVD-2023-24778

AMD EPYC 7002 Processors Crypto Co-Processor improper access control for register interface

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.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in AMD EPYC 7002 Processors, EPYC 7003 Processors, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000 WX Processors, Ryzen Threadripper PRO 5000 WX Processors, Ryzen 3000 Mobile Processors with Radeon Graphics, EPYC Embedded 7002 Processors and EPYC Embedded 7003 Processors. The affected element is an unknown function of the component Crypto Co-Processor. The manipulation results in improper access control for register interface. This vulnerability is reported as CVE-2023-20599. The attack requires a local approach. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in AMD EPYC 7002 Processors, EPYC 7003 Processors, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000 WX Processors, Ryzen Threadripper PRO 5000 WX Processors, Ryzen 3000 Mobile Processors with Radeon Graphics, EPYC Embedded 7002 Processors and EPYC Embedded 7003 Processors. Affected is some unknown functionality of the component Crypto Co-Processor. The manipulation with an unknown input leads to a improper access control for register interface vulnerability. CWE is classifying the issue as CWE-1262. The product uses memory-mapped I/O registers that act as an interface to hardware functionality from software, but there is improper access control to those registers. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Improper register access control in ASP may allow a privileged attacker to perform unauthorized access to ASP’s Crypto Co-Processor (CCP) registers from x86 resulting in potential loss of control of cryptographic key pointer/index leading to loss of integrity or confidentiality.

The advisory is available at amd.com. This vulnerability is traded as CVE-2023-20599 since 10/27/2022. The exploitability is told to be easy. Local access is required to approach this attack. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-24778). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 5.9

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.9
CNA Vector (AMD): 🔍

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: Improper access control for register interface
CWE: CWE-1262 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/27/2022 🔍
06/10/2025 +957 days 🔍
06/10/2025 +0 days 🔍
11/21/2025 +164 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-20599 (🔍)
GCVE (CVE): GCVE-0-2023-20599
GCVE (VulDB): GCVE-100-311922
EUVD: 🔍

Entryinfo

Created: 06/10/2025 19:07
Updated: 11/21/2025 22:53
Changes: 06/10/2025 19:07 (61), 06/11/2025 14:31 (1), 11/21/2025 22:53 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.