PT-2023-13064 · Insyde · Insydeh2O

Published 2023-02-15 · Updated 2023-02-23 · CVE-2022-32471

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Insyde InsydeH2O with kernel versions 5.0 through 5.5

Description An issue was discovered in IhisiSmm where the IhisiDxe driver uses a command buffer to pass input and output data. By modifying the command buffer contents with DMA after input parameters have been checked but before they are used, the IHISI SMM code may be convinced to modify SMRAM or OS, leading to possible data corruption or escalation of privileges.

Recommendations For kernel versions 5.0 through 5.5, consider disabling the IhisiDxe driver as a temporary workaround until a patch is available. Restrict access to the command buffer to minimize the risk of exploitation. Avoid using DMA to modify the command buffer contents after input parameters have been checked.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2022-32471

Affected Products

Insydeh2O

References · 5

• https://osv.dev/vulnerability/CVE-2022-32471 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-32471 · Security Note
• https://insyde.com/security-pledge/SA-2023003 · Vendor Advisory
• https://insyde.com/security-pledge · Vendor Advisory
• https://t.me/cibsecurity/58208 · Telegram Post