Epyc 7h12 Firmware Security Vulnerabilities

CVE-2020-12944

Insufficient validation of BIOS image length by ASP Firmware could lead to arbitrary code execution.

CVE-2020-12946

Insufficient input validation in ASP firmware for discrete TPM commands could allow a potential loss of integrity and denial of service.

CVE-2020-12966

AMD EPYC™ Processors contain an information disclosure vulnerability in the Secure Encrypted Virtualization with Encrypted State (SEV-ES) and Secure Encrypted Virtualization with Secure Nested Paging (SEV-SNP). A local authenticated attacker could potentially exploit this vulnerability leading to l...

CVE-2020-12988

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-2021-26312

Failure to flush the Translation Lookaside Buffer (TLB) of the I/O memory management unit (IOMMU) may lead an IO device to write to memory it should not be able to access, resulting in a potential loss of integrity.

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-2021-26320

Insufficient validation of the AMD SEV Signing Key (ASK) in the SEND_START command in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP

CVE-2021-26321

Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP.

CVE-2021-26322

Persistent platform private key may not be protected with a random IV leading to a potential “two time pad attack”.

CVE-2021-26329

AMD System Management Unit (SMU) may experience an integer overflow when an invalid length is provided which may result in a potential loss of resources.

CVE-2021-26338

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-2021-26340

A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).

CVE-2021-26341

Some AMD CPUs may transiently execute beyond unconditional direct branches, which may potentially result in data leakage.

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-2021-26347

Failure to validate the integer operand in ASP (AMD Secure Processor) bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential 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-2021-26370

Improper validation of destination address in SVC_LOAD_FW_IMAGE_BY_INSTANCE and SVC_LOAD_BINARY_BY_ATTRIB in a malicious UApp or ABL may allow an attacker to overwrite arbitrary bootloader memory with SPI ROM contents resulting in a loss of integrity and availability.

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-2021-26401

LFENCE/JMP (mitigation V2-2) may not sufficiently mitigate CVE-2017-5715 on some AMD CPUs.

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-2021-46778

Execution unit scheduler contention may lead to a side channel vulnerability found on AMD CPU microarchitectures codenamed “Zen 1”, “Zen 2” and “Zen 3” that use simultaneous multithreading (SMT). By measuring the contention level on scheduler queues an attacker may potentially leak sensitive inform...

CVE-2022-23823

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-2022-23824

IBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure.

CVE-2022-23825

Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.

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-2022-29900

Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions.

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.