PT-2023-13062 · Insyde · Insydeh2O

Published 2023-02-15 · Updated 2023-02-25 · CVE-2022-32469

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 where DMA attacks on the PnpSmm shared buffer could cause TOCTOU race-condition issues, leading to corruption of SMRAM and escalation of privileges. This can be mitigated using IOMMU protection for the ACPI runtime memory or by copying firmware block services data to SMRAM before checking it.

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, copying the firmware block services data to SMRAM before checking it can also mitigate this issue.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2022-32469

Affected Products

Insydeh2O

References · 7

• https://insyde.com/security-pledge/SA-2023001 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-32469 · Security Note
• https://insyde.com/security-pledge · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-32469 · Vendor Advisory
• https://t.me/cvenotify/44344 · Telegram Post
• https://t.me/cvenotify/44991 · Telegram Post
• https://t.me/cibsecurity/58229 · Telegram Post