CVE-2023-20520
CRITICALCVSS 9.8/10EPSS 0.79%
Last modified
CVE-2023-20520 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. . EPSS estimates a 0.79% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 72f3 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7313 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7313p Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7343 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7373x Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 73f3 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7413 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7443 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7443p Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7453 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7473x Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 74f3 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7513 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7543 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7543p Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7573x Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 75f3 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7643 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7663 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7713 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7713p Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7763 Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7773x Firmware | milanpi_1.0.0.5 |
| Amd | Epyc 7232p Firmware | romepi_1.0.0.d |
| Amd | Epyc 7252 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7262 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7272 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7282 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7302 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7302p Firmware | romepi_1.0.0.d |
| Amd | Epyc 7352 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7402 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7402p Firmware | romepi_1.0.0.d |
| Amd | Epyc 7452 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7502 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7502p Firmware | romepi_1.0.0.d |
| Amd | Epyc 7532 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7542 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7552 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7642 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7662 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7702 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7702p Firmware | romepi_1.0.0.d |
| Amd | Epyc 7742 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7f32 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7f52 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7f72 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7h12 Firmware | romepi_1.0.0.d |
| Amd | Epyc 7251 Firmware | naplespi_1.0.0.h |
| Amd | Epyc 7261 Firmware | naplespi_1.0.0.h |
Showing 50 of 63 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2023-20520?
CVE-2023-20520 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20520?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-20520?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST