PT-2023-13223 · Insyde · Insydeh2O

Published 2023-02-15 · Updated 2025-03-19 · CVE-2022-32955

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 versions 5.0 through 5.5

Description An issue was discovered in Insyde InsydeH2O that could cause TOCTOU race-condition issues due to DMA attacks on the NvmExpressDxe buffer used by SMM and non-SMM code, potentially leading to corruption of SMRAM and escalation of privileges. This can be mitigated by using IOMMU protection for the ACPI runtime memory used for the command buffer or by copying the link data to SMRAM before checking it and verifying that all pointers are within the buffer.

Recommendations For Insyde InsydeH2O versions 5.0 through 5.5, consider using IOMMU protection for the ACPI runtime memory used for the command buffer as a mitigation measure. For Insyde InsydeH2O versions 5.0 through 5.5, copy the link data to SMRAM before checking it and verify that all pointers are within the buffer to minimize the risk of exploitation.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2022-32955

Affected Products

Insydeh2O

References · 6

• https://insyde.com/security-pledge/SA-2023015 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-32955 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-32955 · Security Note
• https://insyde.com/security-pledge · Vendor Advisory
• https://t.me/cibsecurity/58211 · Telegram Post
• https://t.me/cvenotify/115396 · Telegram Post