AMD EPYC Embedded 9003 SNP Firmware memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in AMD 3rd Gen EPYC Processors, 4th Gen EPYC Processors, EPYC Embedded 7003 and EPYC Embedded 9003. This vulnerability affects unknown code of the component SNP Firmware. Executing a manipulation can lead to memory corruption. This vulnerability appears as CVE-2023-31355. The attack requires local access. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in AMD 3rd Gen EPYC Processors, 4th Gen EPYC Processors, EPYC Embedded 7003 and EPYC Embedded 9003 (unknown version). This vulnerability affects an unknown code block of the component SNP Firmware. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality. CVE summarizes:

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to overwrite a guest's UMC seed potentially allowing reading of memory from a decommissioned guest.

The advisory is shared for download at amd.com. This vulnerability was named CVE-2023-31355 since 04/27/2023. The exploitation appears to be easy. The attack needs to be approached locally. Additional levels of successful authentication are necessary for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 2.3
VulDB Temp Score: 2.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CNA Base Score: 6.0
CNA Vector (AMD): 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/27/2023 🔍
08/05/2024 +466 days 🔍
08/05/2024 +0 days 🔍
11/27/2024 +114 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2023-31355 (🔍)
GCVE (CVE): GCVE-0-2023-31355
GCVE (VulDB): GCVE-100-273628

Entryinfo

Created: 08/05/2024 18:52
Updated: 11/27/2024 06:25
Changes: 08/05/2024 18:52 (62), 11/27/2024 06:25 (13)
Complete: 🔍
Cache ID: 216::103

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