Epyc 7663 Firmware

Improper restriction of write operations in SNP firmware could allow a malicious hypervisor to potentially overwrite a guest's memory or UMC seed resulting in loss of confidentiality and integrity. Rated high severity (CVSS 7.9), this vulnerability is low attack complexity. No vendor patch available.

Improper input validation in SEV-SNP could allow a malicious hypervisor to read or overwrite guest memory potentially leading to data leakage or data corruption. Rated high severity (CVSS 7.9), this vulnerability is low attack complexity. No vendor patch available.

A privileged attacker can prevent delivery of debug exceptions to SEV-SNP guests potentially resulting in guests not receiving expected debug information. Rated low severity (CVSS 3.2), this vulnerability is low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Improper address validation in ASP with SNP enabled may potentially allow an attacker to compromise guest memory integrity. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 4.6), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required. No vendor patch available.

Improper initialization of variables in the DXE driver may allow a privileged user to leak sensitive information via local access. Rated medium severity (CVSS 4.4), this vulnerability is low attack complexity. No vendor patch available.

A side channel vulnerability on some of the AMD CPUs may allow an attacker to influence the return address prediction. Rated medium severity (CVSS 4.7). Public exploit code available and no vendor patch available.

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

An attacker with a compromised ASP could possibly send malformed commands to an ASP on another CPU, resulting in an out of bounds write, potentially leading to a loss a loss of integrity. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Insufficient input validation in the SMU may allow an attacker to improperly lock resources, potentially resulting in a denial of service. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Insufficient input validation of BIOS mailbox messages in SMU may result in out-of-bounds memory reads potentially resulting in a denial of service. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated low severity (CVSS 2.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 5.7), this vulnerability is no authentication required. No vendor patch available.

IBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity.

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. Rated high severity (CVSS 8.4), this vulnerability is low attack complexity. No vendor patch available.

Insufficient DRAM address validation in System Management Unit (SMU) may result in a DMA read from invalid DRAM address to SRAM resulting in SMU not servicing further requests. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Insufficient bounds checking in System Management Unit (SMU) may cause invalid memory accesses/updates that could result in SMU hang and subsequent failure to service any further requests from other. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Improper input and range checking in the AMD Secure Processor (ASP) boot loader image header may allow an attacker to use attacker-controlled values prior to signature validation potentially. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

AMD System Management Unit (SMU) contains a potential issue where a malicious user may be able to manipulate mailbox entries leading to arbitrary code execution. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

AMD System Management Unit (SMU) may experience a heap-based overflow which may result in a loss of resources. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Insufficient validation of guest context in the SNP Firmware could lead to a potential loss of guest confidentiality. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Insufficient input validation in the SNP_GUEST_REQUEST command may lead to a potential data abort error and a denial of service. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Failure to validate SEV Commands while SNP is active may result in a potential impact to memory integrity. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

When the AMD Platform Security Processor (PSP) boot rom loads, authenticates, and subsequently decrypts an encrypted FW, due to insufficient verification of the integrity of decrypted image,. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

Failure to validate VM_HSAVE_PA during SNP_INIT may result in a loss of memory integrity. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

Persistent platform private key may not be protected with a random IV leading to a potential “two time pad attack”. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

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. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.