CVE-2021-46795

A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.

CVSS v3 4.7 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:amd:comboam4v2_pi_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:amd:renoirpi-fp6_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:amd:cezannepi-fp6_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:amd:cezannepi-fp6:-:*:*:*:*:*:*:*

History

20 Jan 2023, 18:36

Type	Values Removed	Values Added
CPE		cpe:2.3:o:amd:comboam4v2_pi_firmware:::::::: cpe:2.3:h:amd:cezannepi-fp6:-:::::::* cpe:2.3:o:amd:cezannepi-fp6_firmware:::::::: cpe:2.3:o:amd:renoirpi-fp6_firmware:::::::: cpe:2.3:h:amd:comboam4v2_pi:-:::::::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.7
References	~~(MISC) https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031 -~~	(MISC) https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031 - Vendor Advisory
First Time		Amd cezannepi-fp6 Firmware Amd comboam4v2 Pi Firmware Amd comboam4v2 Pi Amd cezannepi-fp6 Amd renoirpi-fp6 Firmware Amd
CWE		CWE-367

11 Jan 2023, 08:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-01-11 08:15

Updated : 2023-12-10 14:48

NVD link : CVE-2021-46795

Mitre link : CVE-2021-46795

CVE.ORG link : CVE-2021-46795

JSON object : View

Products Affected

amd

comboam4v2_pi
comboam4v2_pi_firmware
cezannepi-fp6_firmware
cezannepi-fp6
renoirpi-fp6_firmware

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

{"id": "CVE-2021-46795", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.0}]}, "published": "2023-01-11T08:15:13.347", "references": [{"url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031", "tags": ["Vendor Advisory"], "source": "psirt@amd.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-367"}]}], "descriptions": [{"lang": "en", "value": "A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service."}], "lastModified": "2023-01-20T18:36:19.837", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:amd:comboam4v2_pi_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6D075A02-6278-43AB-8108-66DBA2FA3F50", "versionEndExcluding": "1.2.0.5"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DAC265C7-A9A3-4156-9AB3-8F975AED6764"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:amd:renoirpi-fp6_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0E0B55C4-452F-42AD-B00F-4A61CEED1337", "versionEndExcluding": "1.0.0.7"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DAC265C7-A9A3-4156-9AB3-8F975AED6764"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:amd:cezannepi-fp6_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5CEF152D-7D7D-4632-BCDA-FA46A8D8AA12", "versionEndExcluding": "1.0.0.6"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:amd:cezannepi-fp6:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DBE05F55-E039-486A-B3E0-E1CC3BF81049"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "psirt@amd.com"}