CVE-2023-48733 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00013.

Exploitation poc

Automatable no

Technical Impact total

Vendors	Products
Canonical	Lxd
Debian	Debian Linux
Tianocore	Edk2

Configuration 1 [-]

OR	cpe:2.3:a:canonical:lxd:5.0:candidate::::::
	cpe:2.3:a:canonical:lxd:5.21:candidate::::::
	cpe:2.3:a:canonical:lxd:5.21:edge::::::
	cpe:2.3:a:tianocore:edk2::-::::::*

Configuration 2 [-]

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

No data.

No data.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html
https://nvd.nist.gov/vuln/detail/CVE-2023-48733
https://www.openwall.com/lists/oss-security/2024/02/14/4

History

Tue, 26 Aug 2025 17:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Canonical Canonical lxd Debian Debian debian Linux Tianocore Tianocore edk2
CPEs		cpe:2.3:a:canonical:lxd:5.0:candidate:::::: cpe:2.3:a:canonical:lxd:5.21:candidate:::::: cpe:2.3:a:canonical:lxd:5.21:edge:::::: cpe:2.3:a:tianocore:edk2::-::::::* cpe:2.3:o:debian:debian_linux:10.0:::::::*
Vendors & Products		Canonical Canonical lxd Debian Debian debian Linux Tianocore Tianocore edk2

Thu, 08 May 2025 16:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-1188
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: canonical

Published: 2024-02-14T21:54:08.333Z

Updated: 2025-05-08T15:18:23.545Z

Reserved: 2023-12-05T19:36:34.710Z

Link: CVE-2023-48733

Vulnrichment

Updated: 2024-08-02T21:37:54.670Z

NVD

Status : Analyzed

Published: 2024-02-14T22:15:47.320

Modified: 2025-08-26T17:19:40.457

Link: CVE-2023-48733

Redhat

No data.

OpenCVE Enrichment

No data.

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