PT-2022-21899 · Insyde · Insydeh2O Uefi Firmware

Published 2022-11-14 · Updated 2023-02-14 · CVE-2022-33907

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions InsydeH2O UEFI firmware kernel versions prior to 5.2: 05.27.25 InsydeH2O UEFI firmware kernel versions prior to 5.3: 05.36.25 InsydeH2O UEFI firmware kernel versions prior to 5.4: 05.44.25

Description DMA transactions targeted at input buffers used for the software SMI handler in the IdeBusDxe driver could cause SMRAM corruption through a Time-of-Check-to-Time-of-Use (TOCTOU) attack. This issue was discovered by Insyde engineering based on a general description provided by Intel's iSTARE group.

Recommendations For kernel 5.2, update to version 05.27.25 or later. For kernel 5.3, update to version 05.36.25 or later. For kernel 5.4, update to version 05.44.25 or later.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2022-33907

Affected Products

Insydeh2O Uefi Firmware

References · 6

• https://insyde.com/security-pledge · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-33907 · Vendor Advisory
• https://insyde.com/security-pledge/SA-2022049 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-33907 · Security Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-450613.pdf · Note
• https://t.me/cvenotify/37691 · Telegram Post