Buffer overflow in AMD 1st Gen Epyc™
CVE-2023-20520
Improper access control settings in ASP Bootloader may allow an attacker to corrupt the return address causing a stack-based buffer overrun potentially leading to arbitrary code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- AMD 1st Gen Epyc™ — versions various
- AMD 2nd Gen Epyc™ — versions various
- AMD 3rd Gen Epyc™ — versions various
- AMD Epyc 7232p
- AMD Epyc 7232p Firmware — versions romepi_1.0.0.d
- AMD Epyc 7251
- AMD Epyc 7251 Firmware — versions naplespi_1.0.0.h
- AMD Epyc 7252
- AMD Epyc 7252 Firmware — versions romepi_1.0.0.d
- AMD Epyc 7261
Weakness classification (CWE)
References
- www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2023-20520?
- CVE-2023-20520 is a critical-severity vulnerability in AMD 1st Gen Epyc™, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-05-09.
- How severe is CVE-2023-20520?
- Critical severity. CVSS v3 base score is 9.8 out of 10.