AMD EPYC 7001 Processors ASP Kernel access control

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in AMD EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, EPYC 9004 Processors, Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen 5000 Desktop Processor with Radeon Graphics, Ryzen 7000 Desktop Processors, Athlon 3000 Desktop Processors with Radeon Graphics, Ryzen 4000 Desktop Processors with Radeon Graphics, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000WX Processors, Ryzen Threadripper PRO 5000WX Processors, Athlon 3000 Mobile Processors with Radeon Graphics, Ryzen 3000 Mobile Processor with Radeon Graphics, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7035 Processors with Radeon Graphics, Ryzen 5000 Processors with Radeon Graphics, Ryzen 3000 Processors with Radeon Graphics, EPYC Embedded 3000 Processors, EPYC Embedded 7002 Processors, EPYC Embedded 7003 Processors, EPYC Embedded 9003 Processors, Ryzen Embedded R1000 Processors, Ryzen Embedded R2000 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded V1000 Processors, Ryzen Embedded V2000 Processors and Ryzen Embedded V3000 Processors. This affects an unknown function of the component ASP Kernel. This manipulation causes access control. This vulnerability is handled as CVE-2021-26387. It is possible to launch the attack on the local host. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in AMD EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, EPYC 9004 Processors, Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen 5000 Desktop Processor with Radeon Graphics, Ryzen 7000 Desktop Processors, Athlon 3000 Desktop Processors with Radeon Graphics, Ryzen 4000 Desktop Processors with Radeon Graphics, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 3000WX Processors, Ryzen Threadripper PRO 5000WX Processors, Athlon 3000 Mobile Processors with Radeon Graphics, Ryzen 3000 Mobile Processor with Radeon Graphics, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7035 Processors with Radeon Graphics, Ryzen 5000 Processors with Radeon Graphics, Ryzen 3000 Processors with Radeon Graphics, EPYC Embedded 3000 Processors, EPYC Embedded 7002 Processors, EPYC Embedded 7003 Processors, EPYC Embedded 9003 Processors, Ryzen Embedded R1000 Processors, Ryzen Embedded R2000 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded V1000 Processors, Ryzen Embedded V2000 Processors and Ryzen Embedded V3000 Processors. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component ASP Kernel. 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 integrity, and availability. The summary by CVE is:

Insufficient access controls in ASP kernel may allow a privileged attacker with access to AMD signing keys and the BIOS menu or UEFI shell to map DRAM regions in protected areas, potentially leading to a loss of platform integrity.

The advisory is shared at amd.com. This vulnerability is known as CVE-2021-26387 since 01/29/2021. The exploitation appears to be difficult. An attack has to be approached locally. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

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Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.4
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.0
VulDB Temp Score: 2.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 3.9
CNA Vector (AMD): 🔍

CVSSv2info

AVACAuCIA
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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: Partially
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/29/2021 🔍
08/13/2024 +1291 days 🔍
08/13/2024 +0 days 🔍
10/30/2024 +78 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-26387 (🔍)
GCVE (CVE): GCVE-0-2021-26387
GCVE (VulDB): GCVE-100-274381

Entryinfo

Created: 08/13/2024 19:06
Updated: 10/30/2024 20:22
Changes: 08/13/2024 19:06 (62), 10/30/2024 20:22 (1)
Complete: 🔍
Cache ID: 216::103

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