CVEvulnerability

CVE-2020-5953

7.5 HIGH Published 2022-02-03 Modified 2026-08-11 Official page ↗
Status
Modified
Published
2022-02-03
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C

Description

A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).

Affected configurations

• insyde insydeh2o 5.12.09.0074 • insyde insydeh2o 5.23.04.0045 • insyde insydeh2o 5.23.45.0023 • insyde insydeh2o 5.33.15.0034 • insyde insydeh2o 5.34.03.0029 • insyde insydeh2o 5.42.03.0010 • siemens ruggedcom ape1808 firmware • siemens simatic field pg m6 firmware • siemens simatic ipc127e firmware • siemens simatic ipc227g firmware • siemens simatic ipc277g firmware • siemens simatic itp1000 firmware • siemens simatic ipc477e pro firmware • siemens simatic ipc627e firmware • siemens simatic ipc647e firmware • siemens simatic ipc677e firmware • siemens simatic ipc847e firmware • siemens simatic ipc327g firmware • siemens simatic ipc377g firmware • siemens simatic ipc427e firmware • siemens simatic ipc477e firmware • siemens simatic field pg m5 firmware

References