Vulnerability CVE-2022-33985

Vulnerability Name:

CVE-2022-33985 (CCN-240370)

Assigned:

2022-11-08

Published:

2022-11-08

Updated:

2022-11-17

Summary:

DMA transactions which are targeted at input buffers used for the NvmExpressDxe software SMI handler could cause SMRAM corruption through a TOCTOU attack. DMA transactions which are targeted at input buffers used for the software SMI handler used by the NvmExpressDxe driver could cause SMRAM corruption through a TOCTOU attack. This issue was discovered by Insyde engineering based on the general description provided by Intel's iSTARE group. This issue was fixed in kernel 5.2: 05.27.25, kernel 5.3: 05.36.25, kernel 5.4: 05.44.25, kernel 5.5: 05.52.25 https://www.insyde.com/security-pledge/SA-2022055

CVSS v3 Severity:

7.0 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): High Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)
6.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): High Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

6.0 Medium (CCN CVSS v2 Vector: AV:L/AC:H/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): High Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-367

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2022-33985

Source: XF
Type: UNKNOWN
insyde-cve202233985-code-exec(240370)

Source: CCN
Type: Insyde Security Advisory 2022055
Insyde Security Advisory 2022055

Vulnerable Configuration:

Configuration CCN 1:

cpe:/a:insyde:insydeh2o:5.2:*:*:*:*:*:*:*

OR cpe:/a:insyde:insydeh2o:5.3:*:*:*:*:*:*:*

OR cpe:/a:insyde:insydeh2o:5.4:*:*:*:*:*:*:*

OR cpe:/a:insyde:insydeh2o:5.5:*:*:*:*:*:*:*

Denotes that component is vulnerable

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