Vulnerability Monitor

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CVE-2020-27339

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).

Published

2021-06-16T16:15:07.897

Last Modified

2024-11-21T05:21:01.897

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.7 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:C/I:C/A:C

  • Access Vector: LOCAL
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: COMPLETE
  • Integrity Impact: COMPLETE
  • Availability Impact: COMPLETE
Exploitability Score

3.9

Impact Score

10.0

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System insyde insydeh2o < 5.34.44 Yes
Operating System insyde insydeh2o < 5.25.44 Yes
Operating System insyde insydeh2o < 5.16.25 Yes
Operating System insyde insydeh2o < 5.42.44 Yes
Operating System insyde insydeh2o < 5.35.25 Yes
Operating System insyde insydeh2o < 5.26.25 Yes
Operating System insyde insydeh2o < 5.43.25 Yes
Operating System siemens ruggedcom_apr1808_firmware - Yes
Hardware siemens ruggedcom_apr1808 - No
Operating System siemens simatic_field_pg_m5_firmware - Yes
Hardware siemens simatic_field_pg_m5 - No
Operating System siemens simatic_field_pg_m6_firmware - Yes
Hardware siemens simatic_field_pg_m6 - No
Operating System siemens simatic_ipc127e_firmware - Yes
Hardware siemens simatic_ipc127e - No
Operating System siemens simatic_ipc227g_firmware - Yes
Hardware siemens simatic_ipc227g - No
Operating System siemens simatic_ipc277g_firmware - Yes
Hardware siemens simatic_ipc277g - No
Operating System siemens simatic_ipc327g_firmware - Yes
Hardware siemens simatic_ipc327g - No
Operating System siemens simatic_ipc377g_firmware - Yes
Hardware siemens simatic_ipc377g - No
Operating System siemens simatic_ipc427e_firmware - Yes
Hardware siemens simatic_ipc427e - No
Operating System siemens simatic_ipc477e_firmware - Yes
Hardware siemens simatic_ipc477e - No
Operating System siemens simatic_ipc477e_pro_firmware - Yes
Hardware siemens simatic_ipc477e_pro - No
Operating System siemens simatic_ipc627e_firmware - Yes
Hardware siemens simatic_ipc627e - No
Operating System siemens simatic_ipc647e_firmware - Yes
Hardware siemens simatic_ipc647e - No
Operating System siemens simatic_ipc677e_firmware - Yes
Hardware siemens simatic_ipc677e - No
Operating System siemens simatic_ipc847e_firmware - Yes
Hardware siemens simatic_ipc847e - No
Operating System siemens simatic_itp1000_firmware - Yes
Hardware siemens simatic_itp1000 - No
References