CVE-2023-48733

2024-02-1421:54:08

canonical

www.cve.org

cve-2023-48733

uefi shell

vulnerability

ubuntu

edk2

secure boot

bypassing

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.1 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.7%

JSON

An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu’s EDK2. This allows an OS-resident attacker to bypass Secure Boot.

CNA Affected

[
  {
    "packageName": "edk2",
    "product": "Ubuntu EDK II",
    "vendor": "Canonical Ltd.",
    "platforms": [
      "Linux"
    ],
    "versions": [
      {
        "lessThan": "2023.05-2ubuntu0.1",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      }
    ]
  }
]