Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-28806

Severity CVSS v4.0:
Pending analysis
Type:
CWE-787 Out-of-bounds Write
Publication date:
04/05/2022
Last modified:
04/11/2025

Description

An issue was discovered on certain Fujitsu LIEFBOOK devices (A3510, U9310, U7511/U7411/U7311, U9311, E5510/E5410, U7510/U7410/U7310, E459/E449) with BIOS versions before v1.09 (A3510), v2.17 (U9310), v2.30 (U7511/U7411/U7311), v2.33 (U9311), v2.23 (E5510), v2.19 (U7510/U7410), v2.13 (U7310), and v1.09 (E459/E449). The FjGabiFlashCoreAbstractionSmm driver registers a Software System Management Interrupt (SWSMI) handler that is not sufficiently validated to ensure that the CommBuffer (or any other communication buffer's nested contents) are not pointing to SMRAM contents. A potential attacker can therefore write fixed data to SMRAM, which could lead to data corruption inside this memory (e.g., change the SMI handler's code or modify SMRAM map structures to break input pointer validation for other SMI handlers). Thus, the attacker could elevate privileges from ring 0 to ring -2 and execute arbitrary code in SMM.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH
Vector 2.0
AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
7.20
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:fujitsu:lifebook_a3510_firmware:*:*:*:*:*:*:*:* 1.09 (excluding)
cpe:2.3:h:fujitsu:lifebook_a3510:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u9310_firmware:*:*:*:*:*:*:*:* 2.17 (excluding)
cpe:2.3:h:fujitsu:lifebook_u9310:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u7511_firmware:*:*:*:*:*:*:*:* 2.30 (excluding)
cpe:2.3:h:fujitsu:lifebook_u7511:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u7411_firmware:*:*:*:*:*:*:*:* 2.30 (excluding)
cpe:2.3:h:fujitsu:lifebook_u7411:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u7311_firmware:*:*:*:*:*:*:*:* 2.30 (excluding)
cpe:2.3:h:fujitsu:lifebook_u7311:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u9311_firmware:*:*:*:*:*:*:*:* 2.33 (including)
cpe:2.3:h:fujitsu:lifebook_u9311:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_e5510_firmware:*:*:*:*:*:*:*:* 2.23 (excluding)
cpe:2.3:h:fujitsu:lifebook_e5510:-:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:lifebook_u7510_firmware:*:*:*:*:*:*:*:* 2.19 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools