CVE-2022-40250

moderate-risk
Published 2022-09-20

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.

Do I need to act?

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0.09% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
LOCAL / LOW complexity

Affected Products (3)

Nuc M15 Laptop Kit Lapbc510 Firmware
Nuc M15 Laptop Kit Lapbc710 Firmware

Affected Vendors

Intel Ami

References (6)

Vendor Advisory https://www.ami.com/security-center/
Exploit https://www.binarly.io/advisories/BRLY-2022-016
Not Applicable https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712....
Vendor Advisory https://www.ami.com/security-center/
Exploit https://www.binarly.io/advisories/BRLY-2022-016
Not Applicable https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712....
36
/ 100
moderate-risk
Severity 27/34 · High
Exploitability 0/34 · Minimal
Exposure 9/34 · Low