CVE-2022-40261 — HIGH (8.2)

Vulnerability Description

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

CVSS Score

8.2

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Intel	Nuc M15 Laptop Kit Lapbc510 Firmware	-
Intel	Nuc M15 Laptop Kit Lapbc510	-
Intel	Nuc M15 Laptop Kit Lapbc710 Firmware	-
Intel	Nuc M15 Laptop Kit Lapbc710	-
Ami	Aptio V	5.0

Related Weaknesses (CWE)

CWE-120

References

https://www.ami.com/security-center/Vendor Advisory
https://www.binarly.io/advisories/BRLY-2022-003ExploitThird Party Advisory
https://www.ami.com/security-center/Vendor Advisory
https://www.binarly.io/advisories/BRLY-2022-003ExploitThird Party Advisory

FAQ

What is CVE-2022-40261?

CVE-2022-40261 is a vulnerability with a CVSS score of 8.2 (HIGH). 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) an...

How severe is CVE-2022-40261?

CVE-2022-40261 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-40261?

Check the references section above for vendor advisories and patch information. Affected products include: Intel Nuc M15 Laptop Kit Lapbc510 Firmware, Intel Nuc M15 Laptop Kit Lapbc510, Intel Nuc M15 Laptop Kit Lapbc710 Firmware, Intel Nuc M15 Laptop Kit Lapbc710, Ami Aptio V.