CVE-2021-33627

No fix known EPSS <1%

An issue was discovered in Insyde InsydeH2O Kernel 5.0 before 05.09.11, 5.1 before 05.17.11, 5.2 before 05.27.11, 5.3 before 05.36.11, 5.4 before 05.44.11, and 5.5 before 05.52.11 affecting FwBlockServiceSmm. Software SMI services that use the Communicate() function of the EFI_SMM_COMMUNICATION_PROTOCOL do not check whether the address of the buffer is valid, which allows use of SMRAM, MMIO, or OS kernel addresses.

Published 2022-02-03 · CVE record · OSV

Products: Siemens RUGGEDCOM APE1808 - BIOS, Siemens SIMATIC Field PG M5, Siemens SIMATIC Field PG M6, Siemens SIMATIC IPC127E, Siemens SIMATIC IPC227G, Siemens SIMATIC IPC277G, Siemens SIMATIC IPC277G PRO, Siemens SIMATIC IPC327G, Siemens SIMATIC IPC377G, Siemens SIMATIC IPC427E, Siemens SIMATIC IPC477E, Siemens SIMATIC IPC477E PRO, Siemens SIMATIC IPC627E, Siemens SIMATIC IPC647E, Siemens SIMATIC IPC677E, Siemens SIMATIC IPC847E, Siemens SIMATIC ITP1000, Siemens SIPLUS IPC427E