VDB-256596 · CVE-2023-39368 · intel-sa-00972

Intel CPU Bus Lock Regulator denial of service

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-$5k	0.00

Summaryinfo

A vulnerability was found in Intel CPU and classified as critical. Affected is an unknown function of the component Bus Lock Regulator. The manipulation results in denial of service. This vulnerability is identified as CVE-2023-39368. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Intel CPU (Chip Software). It has been classified as critical. Affected is an unknown code of the component Bus Lock Regulator. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was released 03/12/2024 as intel-sa-00972. The advisory is shared for download at intel.com. This vulnerability is traded as CVE-2023-39368 since 08/01/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/19/2024). The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 211574 (Oracle Linux 9 : microcode_ctl (ELSA-2024-9401)), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the vulnerability database at Tenable (211574). Once again VulDB remains the best source for vulnerability data.

Affected

Intel CPU
Citrix Hypervisor

Productinfo

Type

Chip Software

Vendor

Intel

Name

License

commercial

Website

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

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 6.5
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: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 211574
Nessus Name: Oracle Linux 9 : microcode_ctl (ELSA-2024-9401)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/01/2023 🔍
03/12/2024 +224 days 🔍
03/12/2024 +0 days 🔍
04/16/2025 +400 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-00972
Status: Confirmed

CVE: CVE-2023-39368 (🔍)
GCVE (CVE): GCVE-0-2023-39368
GCVE (VulDB): GCVE-100-256596

Entryinfo

Created: 03/12/2024 20:13
Updated: 04/16/2025 04:09
Changes: 03/12/2024 20:13 (38), 03/12/2024 20:14 (1), 04/12/2024 16:00 (15), 04/12/2024 16:06 (10), 11/19/2024 12:05 (3), 04/16/2025 04:09 (3)
Complete: 🔍
Cache ID: 216::103