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CVE-2022-28806

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.

Published

2022-05-04T15:15:13.083

Last Modified

2024-11-21T06:57:57.923

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.9

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-787
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System fujitsu lifebook_a3510_firmware < 1.09 Yes
Hardware fujitsu lifebook_a3510 - No
Operating System fujitsu lifebook_u9310_firmware < 2.17 Yes
Hardware fujitsu lifebook_u9310 - No
Operating System fujitsu lifebook_u7511_firmware < 2.30 Yes
Hardware fujitsu lifebook_u7511 - No
Operating System fujitsu lifebook_u7411_firmware < 2.30 Yes
Hardware fujitsu lifebook_u7411 - No
Operating System fujitsu lifebook_u7311_firmware < 2.30 Yes
Hardware fujitsu lifebook_u7311 - No
Operating System fujitsu lifebook_u9311_firmware ≤ 2.33 Yes
Hardware fujitsu lifebook_u9311 - No
Operating System fujitsu lifebook_e5510_firmware < 2.23 Yes
Hardware fujitsu lifebook_e5510 - No
Operating System fujitsu lifebook_u7510_firmware < 2.19 Yes
Hardware fujitsu lifebook_u7510 - No
Operating System fujitsu lifebook_u7410_firmware < 2.19 Yes
Hardware fujitsu lifebook_u7410 - No
Operating System fujitsu lifebook_u7310_firmware < 2.13 Yes
Hardware fujitsu lifebook_u7310 - No
Operating System fujitsu lifebook_e459_firmware < 1.09 Yes
Hardware fujitsu lifebook_e459 - No
Operating System fujitsu lifebook_e449_firmware < 1.09 Yes
Hardware fujitsu lifebook_e449 - No
References