Vulnerability in AMD Epyc™ 7001 Processors
CVE-2023-20578
A TOCTOU (Time-Of-Check-Time-Of-Use) in SMM may allow an attacker with ring0 privileges and access to the BIOS menu or UEFI shell to modify the communications buffer potentially resulting in arbitrary code execution.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.001 (1.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- AMD Epyc™ 7001 Processors — versions NaplesPI 1.0.0.K
- AMD Epyc™ 7002 Processors — versions RomePI 1.0.0.G
- AMD Epyc™ 7003 Processors — versions MilanPI 1.0.0.B
- AMD Epyc™ 9004 Processors — versions GenoaPI 1.0.0.2
- AMD Epyc™ Embedded 3000 — versions SnowyOwl PI 1.1.0.A
- AMD Epyc™ Embedded 7002 — versions EmbRomePI-SP3 1.0.0.A
- AMD Epyc™ Embedded 7003 — versions EmbMilanPI-SP3 1.0.0.7
- AMD Epyc™ Embedded 9003 — versions EmbGenoaPI-SP5 1.0.0.0
- AMD Ryzen™ 6000 Series Processors With Radeon™ Graphics — versions RembrandtPI-FP7 1.0.0.9b
- AMD Ryzen™ 7000 Series Desktop Processors — versions ComboAM5 1.0.0.1
Weakness classification (CWE)
References
- www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-20578?
- CVE-2023-20578 is a high-severity vulnerability in AMD Epyc™ 7001 Processors, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.5/10. Published 2024-08-13.
- How severe is CVE-2023-20578?
- High severity. CVSS v3 base score is 7.5 out of 10.