PT-2022-21897 · Insyde · Ahcibusdxe

Published 2022-11-14 · Updated 2022-11-18 · CVE-2022-33905

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 AhciBusDxe driver versions prior to kernel 5.2: 05.27.23 AhciBusDxe driver versions prior to kernel 5.3: 05.36.23 AhciBusDxe driver versions prior to kernel 5.4: 05.44.23 AhciBusDxe driver versions prior to kernel 5.5: 05.52.23

Description The issue is related to DMA transactions targeting input buffers used by the AhciBusDxe software SMI handler, which could cause SMRAM corruption through a Time-of-Check-to-Time-of-Use (TOCTOU) attack. This was discovered by Insyde engineering based on a description provided by Intel's iSTARE group.

Recommendations For versions prior to kernel 5.2: 05.27.23, update to kernel 5.2: 05.27.23 or later. For versions prior to kernel 5.3: 05.36.23, update to kernel 5.3: 05.36.23 or later. For versions prior to kernel 5.4: 05.44.23, update to kernel 5.4: 05.44.23 or later. For versions prior to kernel 5.5: 05.52.23, update to kernel 5.5: 05.52.23 or later.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2022-33905

Affected Products

Ahcibusdxe

References · 4

• https://insyde.com/security-pledge/SA-2022047 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-33905 · Security Note
• https://osv.dev/vulnerability/CVE-2022-33905 · Vendor Advisory
• https://insyde.com/security-pledge · Vendor Advisory