AMD 3rd Gen EPYC Processors/4th Gen EPYC Processors SEV Firmware initialization

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.
5.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in AMD 3rd Gen EPYC Processors and 4th Gen EPYC Processors. This affects an unknown function of the component SEV Firmware. The manipulation leads to initialization. This vulnerability is traded as CVE-2023-31346. There is no exploit available.

Detailsinfo

A vulnerability was found in AMD 3rd Gen EPYC Processors and 4th Gen EPYC Processors (version now known) and classified as critical. This issue affects some unknown processing of the component SEV Firmware. The manipulation with an unknown input leads to a initialization vulnerability. Using CWE to declare the problem leads to CWE-665. The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used. The impact remains unknown. The summary by CVE is:

Failure to initialize memory in SEV Firmware may allow a privileged attacker to access stale data from other guests.

The weakness was shared 02/13/2024. It is possible to read the advisory at amd.com. The identification of this vulnerability is CVE-2023-31346 since 04/27/2023. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 226418 (Linux Distros Unpatched Vulnerability : CVE-2023-31346), 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 (226418). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CVSSv2info

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

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

Exploitinginfo

Class: Initialization
CWE: CWE-665
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 226418
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-31346

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/27/2023 🔍
02/13/2024 +292 days 🔍
02/13/2024 +0 days 🔍
03/06/2025 +386 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-31346 (🔍)
GCVE (CVE): GCVE-0-2023-31346
GCVE (VulDB): GCVE-100-253679

Entryinfo

Created: 02/13/2024 20:29
Updated: 03/06/2025 00:35
Changes: 02/13/2024 20:29 (36), 10/24/2024 18:58 (26), 03/06/2025 00:35 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source 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!