CVE-2022-28806 Memory corruption in n/a
Attackers can corrupt SMRAM via insufficient validation in the FjGabiFlashCoreAbstractionSmm driver, enabling arbitrary code execution in System Management Mode.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-28806?
CVE-2022-28806 is a high-severity memory corruption vulnerability in n/a, published on 4 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2022-28806?
It affects 12 products.
Products include Fujitsu Lifebook A3510 Firmware, Fujitsu Lifebook E449 Firmware, Fujitsu Lifebook E459 Firmware, Fujitsu Lifebook E5510 Firmware, Fujitsu Lifebook U7310 Firmware, Fujitsu Lifebook U7311 Firmware and 6 more.
How do I fix CVE-2022-28806?
No fix has been published for CVE-2022-28806 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-28806 being exploited?
There is no known exploitation of CVE-2022-28806 in the wild and no public exploit code.
Sources
Also known as GHSA-mj72-h98r-6h24.