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6.7mediumMedium

CVE-2020-27339

Insyde Insydeh2o

In the kernel in Insyde InsydeH2O 5.x, certain SMM drivers did not correctly validate the CommBuffer and CommBufferSize parameters, allowing callers to corrupt either the firmware or the OS memory. The fixed versions for this issue in the AhciBusDxe, IdeBusDxe, NvmExpressDxe, SdHostDriverDxe, and SdMmcDeviceDxe drivers are 05.16.25, 05.26.25, 05.35.25, 05.43.25, and 05.51.25 (for Kernel 5.1 through 5.5).

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is requires local access to the machine.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, an administrative account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
6.7 (v3.1)
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-20
Assigned by
cve@mitre.org

Dates

Published
2021-06-16
Last modified
2026-08-11
Sources
NVD

Affected products

  • Insyde Insydeh2o5.3 - 5.34.44, 5.2 - 5.25.44, 5.1 - 5.16.25, 5.4 - 5.42.44, 5.3 - 5.35.25, 5.2 - 5.26.25, 5.4 - 5.43.25
  • Siemens Ruggedcom Apr1808 Firmwareall versions
  • Siemens Ruggedcom Apr1808all versions
  • Siemens Simatic Field Pg M5 Firmwareall versions
  • Siemens Simatic Field Pg M5all versions
  • Siemens Simatic Field Pg M6 Firmwareall versions
  • Siemens Simatic Field Pg M6all versions
  • Siemens Simatic Ipc127e Firmwareall versions
  • Siemens Simatic Ipc127eall versions
  • Siemens Simatic Ipc227g Firmwareall versions
  • Siemens Simatic Ipc227gall versions
  • Siemens Simatic Ipc277g Firmwareall versions

As listed in the NVD configuration data. Not a statement about your estate.

References