Epyc 7763 Firmware
CVE-2023-20523
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture TOCTOU prevention
|
| Impact | CVSS score of 5.7 (MEDIUM). Attack characteristics: physical attack vector, high complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | Successful exploitation could compromise the medium-severity affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAI
TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-367. TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service. Affected products include: Amd Epyc 7H12 Firmware, Amd Epyc 7F72 Firmware, Amd Epyc 7F52 Firmware, Amd Epyc 7F32 Firmware, Amd Epyc 7742 Firmware.
Know when Epyc 7763 Firmware gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
More in Epyc 7763 Firmware
View allImproper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-b
A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. R
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to fl
Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a g
Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially le
Improper input and range checking in the AMD Secure Processor (ASP) boot loader image header may allow an attacker to us
AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox ent
Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity. Rated high se
When the AMD Platform Security Processor (PSP) boot rom loads, authenticates, and subsequently decrypts an encrypted FW,
Failure to validate VM_HSAVE_PA during SNP_INIT may result in a loss of memory integrity. Rated high severity (CVSS 7.8)
Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integri
Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an inva
GitHub PoC
Exploit-DB