VDB-245373 · CVE-2023-40540 · intel-sa-01001

Intel NUC BIOS Firmware non-transparent sharing of microarchitectural resources

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.
3.5	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Intel NUC BIOS Firmware. The impacted element is an unknown function. Performing a manipulation results in non-transparent sharing of microarchitectural resources. This vulnerability was named CVE-2023-40540. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Intel NUC BIOS Firmware (Firmware Software) (affected version not known). It has been classified as problematic. This affects some unknown functionality. The manipulation with an unknown input leads to a non-transparent sharing of microarchitectural resources vulnerability. CWE is classifying the issue as CWE-1303. Hardware structures shared across execution contexts (e.g., caches and branch predictors) can violate the expected architecture isolation between contexts. This is going to have an impact on confidentiality. The summary by CVE is:

Non-Transparent Sharing of Microarchitectural Resources in some Intel(R) NUC BIOS firmware may allow a privileged user to potentially enable information disclosure via local access.

The weakness was presented 11/14/2023 as intel-sa-01001. The advisory is shared at intel.com. This vulnerability is uniquely identified as CVE-2023-40540 since 08/23/2023. Neither technical details nor an exploit are publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

Firmware Software

Vendor

Intel

Name

NUC BIOS Firmware

License

commercial

Website

Vendor: https://www.intel.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 1.9
VulDB Temp Score: 1.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CNA Base Score: 4.1
CNA Vector (Intel Corporation): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Non-transparent sharing of microarchitectural resources
CWE: CWE-1303
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/23/2023 🔍
11/14/2023 +83 days 🔍
11/14/2023 +0 days 🔍
12/09/2023 +25 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-01001
Status: Confirmed

CVE: CVE-2023-40540 (🔍)
GCVE (CVE): GCVE-0-2023-40540
GCVE (VulDB): GCVE-100-245373

Entryinfo

Created: 11/14/2023 21:40
Updated: 12/09/2023 18:15
Changes: 11/14/2023 21:40 (47), 12/09/2023 18:15 (11)
Complete: 🔍
Cache ID: 216::103