AMD Epyc 7502p Firmware vulnerabilities

72 CVEs affecting AMD Epyc 7502p Firmware, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2023-20578, published 2024-08-13.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2023-20593, published 2023-07-24. Medium severity, CVSS 5.5. EPSS: 5.2% chance of exploitation in the next 30 days. An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.
• CVE-2022-29900, published 2022-07-12. Medium severity, CVSS 6.5. EPSS: 3.9% chance of exploitation in the next 30 days. Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions.
• CVE-2022-23823, published 2022-06-15. Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days. A potential vulnerability in some AMD processors using frequency scaling may allow an authenticated attacker to execute a timing attack to potentially enable information disclosure.
• CVE-2021-26322, published 2021-11-16. High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days. Persistent platform private key may not be protected with a random IV leading to a potential “two time pad attack”.
• CVE-2020-12988, published 2021-06-11. High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days. A potential denial of service (DoS) vulnerability exists in the integrated chipset that may allow a malicious attacker to hang the system when it is rebooted.
• CVE-2023-20592, published 2023-11-14. Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days. Improper or unexpected behavior of the INVD instruction in some AMD CPUs may allow an attacker with a malicious hypervisor to affect cache line write-back behavior of the CPU leading to a potential…
• CVE-2021-26338, published 2021-11-16. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. Improper access controls in System Management Unit (SMU) may allow for an attacker to override performance control tables located in DRAM resulting in a potential lack of system resources.
• CVE-2023-20575, published 2023-07-11. Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days. A potential power side-channel vulnerability in some AMD processors may allow an authenticated attacker to use the power reporting functionality to monitor a program’s execution inside an AMD SEV VM…
• CVE-2023-20520, published 2023-05-09. Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days. 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.
• CVE-2022-23825, published 2022-07-14. Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days. Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.

Latest

• CVE-2023-20578, published 2024-08-13. Medium severity, CVSS 6.4. EPSS: 0.1% chance of exploitation in the next 30 days. 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…
• CVE-2021-26344, published 2024-08-13. High severity, CVSS 8.2. EPSS: 0.2% chance of exploitation in the next 30 days. An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting…
• CVE-2023-20533, published 2023-11-14. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.
• CVE-2023-20526, published 2023-11-14. Medium severity, CVSS 4.6. EPSS: 0.3% chance of exploitation in the next 30 days. Insufficient input validation in the ASP Bootloader may enable a privileged attacker with physical access to expose the contents of ASP memory potentially leading to a loss of confidentiality.
• CVE-2023-20521, published 2023-11-14. Medium severity, CVSS 5.7. EPSS: 0.3% chance of exploitation in the next 30 days. TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of…
• CVE-2021-46774, published 2023-11-14. High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days. Insufficient DRAM address validation in System Management Unit (SMU) may allow an attacker to read/write from/to an invalid DRAM address, potentially resulting in denial-of-service.
• CVE-2021-26345, published 2023-11-14. Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days. Failure to validate the value in APCB may allow a privileged attacker to tamper with the APCB token to force an out-of-bounds memory read potentially resulting in a denial of service.