Canonical Ubuntu EDK II prior 2023.05-2ubuntu0.1 UEFI Shell insecure default initialization of resource

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Canonical Ubuntu EDK II. It has been classified as critical. Affected is an unknown function of the component UEFI Shell. Performing a manipulation results in an unknown weakness. This vulnerability was named CVE-2023-48733. The attack needs to be approached locally. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Canonical Ubuntu EDK II. It has been classified as critical. This affects an unknown code block of the component UEFI Shell. CWE is classifying the issue as CWE-1188. The product initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented 02/15/2024 by Mate Kukri. It is possible to read the advisory at bugs.launchpad.net. This vulnerability is uniquely identified as CVE-2023-48733 since 12/05/2023. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2023.05-2ubuntu0.1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.7
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.7
CNA Vector (Canonical Ltd.): 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Insecure default initialization of resource
CWE: CWE-1188
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Ubuntu EDK II 2023.05-2ubuntu0.1

Timelineinfo

12/05/2023 🔍
02/15/2024 +72 days 🔍
02/15/2024 +0 days 🔍
05/08/2025 +448 days 🔍

Sourcesinfo

Advisory: bugs.launchpad.net
Researcher: Mate Kukri
Status: Confirmed

CVE: CVE-2023-48733 (🔍)
GCVE (CVE): GCVE-0-2023-48733
GCVE (VulDB): GCVE-100-253923

Entryinfo

Created: 02/15/2024 09:11
Updated: 05/08/2025 20:03
Changes: 02/15/2024 09:11 (48), 07/01/2024 01:31 (15), 05/08/2025 20:03 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!