Vulnerability Monitor

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CVE-2021-44149

An issue was discovered in Trusted Firmware OP-TEE Trusted OS through 3.15.0. The OPTEE-OS CSU driver for NXP i.MX6UL SoC devices lacks security access configuration for wakeup-related registers, resulting in TrustZone bypass because the NonSecure World can perform arbitrary memory read/write operations on Secure World memory. This involves a v cycle.

Published

2021-12-07T21:15:08.653

Last Modified

2024-11-21T06:30:26.640

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

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

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linaro	op-tee	≤ 3.15.0	Yes
Hardware	nxp	i.mx_6ultralite	-	No

References

https://github.com/OP-TEE/optee_os/tags Release Notes, Third Party Advisory ([email protected])
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt Third Party Advisory ([email protected])
https://github.com/OP-TEE/optee_os/tags Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0002-OP-TEE_TrustZone_bypass_at_wakeup.txt Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)