Intel CPU sequence of processor instructions leads to unexpected behavior

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.
8.1$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Intel CPU. This vulnerability affects unknown code. The manipulation results in sequence of processor instructions leads to unexpected behavior. This vulnerability is reported as CVE-2023-23583. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability was found in Intel CPU (Chip Software) (unknown version). It has been classified as critical. Affected is an unknown code block. The manipulation with an unknown input leads to a sequence of processor instructions leads to unexpected behavior vulnerability. CWE is classifying the issue as CWE-1281. Specific combinations of processor instructions lead to undesirable behavior such as locking the processor until a hard reset performed. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Sequence of processor instructions leads to unexpected behavior for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege and/or information disclosure and/or denial of service via local access.

The weakness was disclosed 11/14/2023 as intel-sa-00950. The advisory is shared for download at intel.com. This vulnerability is traded as CVE-2023-23583 since 05/11/2023. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/08/2025).

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.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (Intel Corporation): 🔍

CVSSv2info

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

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

Exploitinginfo

Class: Sequence of processor instructions leads to unexpected behavior
CWE: CWE-1281
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

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

05/11/2023 🔍
11/14/2023 +187 days 🔍
11/14/2023 +0 days 🔍
01/08/2025 +421 days 🔍

Sourcesinfo

Vendor: intel.com

Advisory: intel-sa-00950
Status: Confirmed

CVE: CVE-2023-23583 (🔍)
GCVE (CVE): GCVE-0-2023-23583
GCVE (VulDB): GCVE-100-245292

Entryinfo

Created: 11/14/2023 21:01
Updated: 01/08/2025 01:38
Changes: 11/14/2023 21:01 (47), 12/09/2023 11:52 (11), 11/19/2024 12:05 (16), 01/08/2025 01:38 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!