CVE-2022-32267

15.11.2022, 00:15

DMA transactions which are targeted at input buffers used for the SmmResourceCheckDxe software SMI handler cause SMRAM corruption (a TOCTOU attack) DMA transactions which are targeted at input buffers used for the software SMI handler used by the SmmResourceCheckDxe driver could cause SMRAM corruption through a TOCTOU attack... This issue was discovered by Insyde engineering. Fixed in kernel Kernel 5.2: 05.27.23. Kernel 5.3: 05.36.23. Kernel 5.4: 05.44.23. Kernel 5.5: 05.52.23 https://www.insyde.com/security-pledge/SA-2022046

TOCTOU

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	6.4 MEDIUM	LOCAL	HIGH	HIGH	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
mitre	CNA	---				---
CVE	ADP	---				---
CISA-ADP	ADP	6.4 MEDIUM	LOCAL	HIGH	HIGH	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 8%

Vendor	Product	Version
insyde	kernel	5.2 ≤ 𝑥 < 5.2.05.27.23
insyde	kernel	5.3 ≤ 𝑥 < 5.3.05.36.23
insyde	kernel	5.4 ≤ 𝑥 < 5.4.05.44.23
insyde	kernel	5.5 ≤ 𝑥 < 5.5.05.52.23

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state.

References

https://www.insyde.com/security-pledge

https://www.insyde.com/security-pledge/SA-2022046

https://www.insyde.com/security-pledge

https://www.insyde.com/security-pledge/SA-2022046