Epyc 7352 Firmware Security Vulnerabilities - 2023

CVE-2021-26316

Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.

CVE-2021-26345

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.

CVE-2021-26354

Insufficient bounds checking in ASP may allow anattacker to issue a system call from a compromised ABL which may causearbitrary memory values to be initialized to zero, potentially leading to aloss of integrity.

CVE-2021-26356

A TOCTOU in ASP bootloader may allow an attackerto tamper with the SPI ROM following data read to memory potentially resultingin S3 data corruption and information disclosure.

CVE-2021-26371

A compromised or malicious ABL or UApp couldsend a SHA256 system call to the bootloader, which may result in exposure ofASP memory to userspace, potentially leading to information disclosure.

CVE-2021-26379

Insufficient input validation of mailbox data in theSMU may allow an attacker to coerce the SMU to corrupt SMRAM, potentiallyleading to a loss of integrity and privilege escalation.

CVE-2021-26398

Insufficient input validation in SYS_KEY_DERIVE system call in a compromised user application or ABL may allow an attacker to corrupt ASP (AMD Secure Processor) OS memory which may lead to potential arbitrary code execution.

CVE-2021-26402

Insufficient bounds checking in ASP (AMD Secure Processor) firmware while handling BIOS mailbox commands, may allow an attacker to write partially-controlled data out-of-bounds to SMM or SEV-ES regions which may lead to a potential loss of integrity and availability.

CVE-2021-26403

Insufficient checks in SEV may lead to a malicious hypervisor disclosing the launch secret potentially resulting in compromise of VM confidentiality.

CVE-2021-26406

Insufficient validation in parsing Owner'sCertificate Authority (OCA) certificates in SEV (AMD Secure Encrypted Virtualization)and SEV-ES user application can lead to a host crash potentially resulting indenial of service.

CVE-2021-46756

Insufficient validation of inputs inSVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow anattacker with a malicious Uapp or ABL to send malformed or invalid syscall tothe bootloader resulting in a potential denial of service and loss ofintegrity.

CVE-2021-46762

Insufficient input validation in the SMU mayallow an attacker to corrupt SMU SRAM potentially leading to a loss ofintegrity or denial of service.

CVE-2021-46763

Insufficient input validation in the SMU mayenable a privileged attacker to write beyond the intended bounds of a sharedmemory buffer potentially leading to a loss of integrity.

CVE-2021-46764

Improper validation of DRAM addresses in SMU mayallow an attacker to overwrite sensitive memory locations within the ASPpotentially resulting in a denial of service.

CVE-2021-46769

Insufficient syscall input validation in the ASPBootloader may allow a privileged attacker to execute arbitrary DMA copies,which can lead to code execution.

CVE-2021-46774

Insufficient DRAM address validation in SystemManagement Unit (SMU) may allow an attacker to read/write from/to an invalidDRAM address, potentially resulting in denial-of-service.

CVE-2021-46775

Improper input validation in ABL may enable anattacker with physical access, to perform arbitrary memory overwrites,potentially leading to a loss of integrity and code execution.

CVE-2022-27672

When SMT is enabled, certain AMD processors may speculatively execute instructions using a targetfrom the sibling thread after an SMT mode switch potentially resulting in information disclosure.

CVE-2023-20520

Improper access control settings in ASPBootloader may allow an attacker to corrupt the return address causing astack-based buffer overrun potentially leading to arbitrary code execution.

CVE-2023-20521

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 service.

CVE-2023-20523

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.

CVE-2023-20524

An attacker with a compromised ASP couldpossibly send malformed commands to an ASP on another CPU, resulting in an outof bounds write, potentially leading to a loss a loss of integrity.

CVE-2023-20525

Insufficient syscall input validation in the ASP Bootloader may allow a privileged attacker to read memory outside the bounds of a mapped register potentially leading to a denial of service.

CVE-2023-20526

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-2023-20527

Improper syscall input validation in the ASP Bootloader may allow a privileged attacker to read memory out-of-bounds, potentially leading to a denial-of-service.

CVE-2023-20528

Insufficient input validation in the SMU may allow a physical attacker to exfiltrate SMU memory contents over the I2C bus potentially leading to a loss of confidentiality.

CVE-2023-20529

Insufficient bound checks in the SMU may allow an attacker to update the from/to address space to an invalid value potentially resulting in a denial of service.

CVE-2023-20531

Insufficient bound checks in the SMU may allow an attacker to update the SRAM from/to address space to an invalid value potentially resulting in a denial of service.

CVE-2023-20532

Insufficient input validation in the SMU may allow an attacker to improperly lock resources, potentially resulting in a denial of service.

CVE-2023-20533

Insufficient DRAM address validation in SystemManagement Unit (SMU) may allow an attacker to read/write from/to an invalidDRAM address, potentially resulting in denial-of-service.

CVE-2023-20575

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 potentially resulting in a leak of sensitive information.

CVE-2023-20592

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 loss of guest virtual machine (VM) memory integrity.

CVE-2023-20593

An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.