Improper buffer restrictions in BIOS firmware for some Intel(R) NUC M15 Laptop Kits before version BCTGL357.0074 may allow a privileged user to potentially enable escalation of privilege via local access.

Improper buffer restrictions in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via local access.

Improper input validation in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via physical access.

Improper input validation in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via local access.

Improper initialization in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via physical access.

Improper buffer restriction in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via local access.

Improper initialization in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable an escalation of privilege via local access.

A potential attacker can execute an arbitrary code at the time of the PEI phase and influence the subsequent boot stages. This can lead to the mitigations bypassing, physical memory contents disclosure, discovery of any secrets from any Virtual Machines (VMs) and bypassing memory isolation and confidential computing boundaries. Additionally, an attacker can build a payload which can be injected into the SMRAM memory. This issue affects: Module name: PlatformInitAdvancedPreMem SHA256: 644044fdb8daea30a7820e0f5f88dbf5cd460af72fbf70418e9d2e47efed8d9b Module GUID: EEEE611D-F78F-4FB9-B868-55907F169280 This issue affects: AMI Aptio 5.x.

An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) and completely isolated from it. Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: OverClockSmiHandler SHA256: a204699576e1a48ce915d9d9423380c8e4c197003baf9d17e6504f0265f3039c Module GUID: 4698C2BD-A903-410E-AD1F-5EEF3A1AE422

An attacker can exploit this vulnerability to elevate privileges from ring 0 to ring -2, execute arbitrary code in System Management Mode - an environment more privileged than operating system (OS) and completely isolated from it. Running arbitrary code in SMM additionally bypasses SMM-based SPI flash protections against modifications, which can help an attacker to install a firmware backdoor/implant into BIOS. Such a malicious firmware code in BIOS could persist across operating system re-installs. Additionally, this vulnerability potentially could be used by malicious actors to bypass security mechanisms provided by UEFI firmware (for example, Secure Boot and some types of memory isolation for hypervisors). This issue affects: Module name: SmmSmbiosElog SHA256: 3a8acb4f9bddccb19ec3b22b22ad97963711550f76b27b606461cd5073a93b59 Module GUID: 8e61fd6b-7a8b-404f-b83f-aa90a47cabdf This issue affects: AMI Aptio 5.x. This issue affects: AMI Aptio 5.x.