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: SmmSmbiosElog SHA256: 3a8acb4f9bddccb19ec3b22b22ad97963711550f76b27b606461cd5073a93b59 Module GUID: 8e61fd6b-7a8b-404f-b83f-aa90a47cabdf This issue affects: AMI Aptio 5.x. This issue affects: AMI Aptio 5.x.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  8.8 HIGH

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

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://www.ami.com/security-center/	Vendor Advisory
https://www.binarly.io/advisories/BRLY-2022-016	Exploit  Third Party Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.html	Not Applicable  Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	NIST
CWE-121	Stack-based Buffer Overflow	CERT/CC

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 9/23/2022 10:38:05 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		AND OR *cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc510_firmware:bc0074:*:*:*:*:*:*:* OR cpe:2.3:h:intel:nuc_m15_laptop_kit_lapbc510:-:*:*:*:*:*:*:*
Added	CPE Configuration		AND OR *cpe:2.3:o:intel:nuc_m15_laptop_kit_lapbc710_firmware:bc0074:*:*:*:*:*:*:* OR cpe:2.3:h:intel:nuc_m15_laptop_kit_lapbc710:-:*:*:*:*:*:*:*
Added	CPE Configuration		OR *cpe:2.3:o:ami:aptio_v:5.0:*:*:*:*:*:*:*
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Added	CWE		NIST CWE-787
Changed	Reference Type	https://www.ami.com/security-center/ No Types Assigned	https://www.ami.com/security-center/ Vendor Advisory
Changed	Reference Type	https://www.binarly.io/advisories/BRLY-2022-016 No Types Assigned	https://www.binarly.io/advisories/BRLY-2022-016 Exploit, Third Party Advisory
Changed	Reference Type	https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.html No Types Assigned	https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00712.html Not Applicable, Third Party Advisory