Description
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. DMA attacks on the VariableRuntimeDxe shared buffer used by SMM and non-SMM code could cause TOCTOU race-condition issues that could lead to corruption of SMRAM and escalation of privileges. This issue was fixed in the kernel, which also protected chipset and OEM chipset code.
Advisories 3
- WID-SEC-2023-0393 Lenovo Computer: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 18, 2023
- ICSA-23-257-04 Siemens RUGGEDCOM APE1808 Products CISA ICS & IT advisories · Sep 12, 2023
- SSA-957369 SSA-957369: Insyde BIOS Vulnerabilities in RUGGEDCOM APE1808 Product Family Siemens ProductCERT · Sep 12, 2023