AMD EPYC SEV Signing Key certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in AMD EPYC. Affected by this vulnerability is an unknown functionality of the component SEV Signing Key Handler. The manipulation leads to certificate validation. This vulnerability is uniquely identified as CVE-2021-26320. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in AMD EPYC (version now known). It has been rated as critical. This issue affects some unknown processing of the component SEV Signing Key Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is availability.

The weakness was disclosed 11/18/2021. The advisory is shared at amd.com. The identification of this vulnerability is CVE-2021-26320 since 01/29/2021. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

Upgrading eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

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 🔍
11/18/2021 +293 days 🔍
11/18/2021 +0 days 🔍
11/21/2021 +3 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-26320 (🔍)
GCVE (CVE): GCVE-0-2021-26320
GCVE (VulDB): GCVE-100-186857

Entryinfo

Created: 11/18/2021 08:06
Updated: 11/21/2021 14:24
Changes: 11/18/2021 08:06 (38), 11/21/2021 14:20 (1), 11/21/2021 14:24 (18)
Complete: 🔍
Cache ID: 216::103

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