Vulnerability Monitor

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CVE-2021-36133

The OPTEE-OS CSU driver for NXP i.MX SoC devices lacks security access configuration for several models, resulting in TrustZone bypass because the NonSecure World can perform arbitrary memory read/write operations on Secure World memory. This involves a DMA capable peripheral.

Published

2021-12-07T21:15:08.257

Last Modified

2024-11-21T06:13:11.133

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.1 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:N

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

3.9

Impact Score

4.9

Weaknesses

Type: Primary
CWE-732

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linaro	op-tee	-	Yes
Hardware	nxp	i.mx_6	-	No
Hardware	nxp	i.mx_6solox	-	No
Hardware	nxp	i.mx_6ull	-	No
Hardware	nxp	i.mx_6ulz	-	No
Hardware	nxp	i.mx_7ds	-	No
Hardware	nxp	i.mx6sx	-	No

References

https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0001-OP-TEE_TrustZone_bypass.txt Third Party Advisory ([email protected])
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0001-OP-TEE_TrustZone_bypass.txt Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)