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AMDCVE-2021-46795

HistoryJan 11, 2023 - 8:15 a.m.

CVE-2021-46795

2023-01-1108:15:13

CWE-367

AMD

web.nvd.nist.gov

cve-2021-46795

toctou vulnerability

bios compromise

tee os

denial of service

CVSS3

4.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

5.4

Confidence

High

EPSS

Percentile

12.7%

JSON

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.

Affected configurations

Nvd

Node

amdcomboam4v2_pi_firmwareRange<1.2.0.5

AND

amdcomboam4v2_piMatch-

Node

amdrenoirpi-fp6_firmwareRange<1.0.0.7

AND

amdcomboam4v2_piMatch-

Node

amdcezannepi-fp6_firmwareRange<1.0.0.6

AND

amdcezannepi-fp6Match-

VendorProductVersionCPE
amdcomboam4v2_pi_firmware*cpe:2.3:o:amd:comboam4v2_pi_firmware:*:*:*:*:*:*:*:*
amdcomboam4v2_pi-cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*
amdrenoirpi-fp6_firmware*cpe:2.3:o:amd:renoirpi-fp6_firmware:*:*:*:*:*:*:*:*
amdcezannepi-fp6_firmware*cpe:2.3:o:amd:cezannepi-fp6_firmware:*:*:*:*:*:*:*:*
amdcezannepi-fp6-cpe:2.3:h:amd:cezannepi-fp6:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
amd	comboam4v2_pi_firmware	*	cpe:2.3:o:amd:comboam4v2_pi_firmware::::::::
amd	comboam4v2_pi	-	cpe:2.3:h:amd:comboam4v2_pi:-:::::::*
amd	renoirpi-fp6_firmware	*	cpe:2.3:o:amd:renoirpi-fp6_firmware::::::::
amd	cezannepi-fp6_firmware	*	cpe:2.3:o:amd:cezannepi-fp6_firmware::::::::
amd	cezannepi-fp6	-	cpe:2.3:h:amd:cezannepi-fp6:-:::::::*

CNA Affected

[
  {
    "defaultStatus": "affected",
    "packageName": "AGESA",
    "platforms": [
      "x86"
    ],
    "product": "Ryzen 5000 Series",
    "vendor": " AMD",
    "versions": [
      {
        "status": "affected",
        "version": "various "
      }
    ]
  },
  {
    "defaultStatus": "unaffected",
    "packageName": "AGESA",
    "platforms": [
      "x86"
    ],
    "product": "Ryzen 3000 Series ",
    "vendor": " AMD",
    "versions": [
      {
        "status": "affected",
        "version": "various "
      }
    ]
  }
]