CVE-2021-36133 : The OPTEE-OS CSU driver for NXP i.MX SoC devices lacks security access configura

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 2021-12-07 21:15:08

Updated 2021-12-09 19:53:15

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2021-36133

Linaro » Op-tee » Version: N/A
cpe:2.3:o:linaro:op-tee:-:*:*:*:*:*:*:*
Matching versions
When used together with: NXP » I.mx 6 » Version: N/A
When used together with: NXP » I.mx 6solox » Version: N/A
When used together with: NXP » I.mx 6ull » Version: N/A
When used together with: NXP » I.mx 6ulz » Version: N/A
When used together with: NXP » I.mx 7ds » Version: N/A
When used together with: NXP » I.mx6sx » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-36133

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 13 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-36133

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.6	LOW	AV:L/AC:L/Au:N/C:P/I:P/A:N	3.9	4.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
7.1	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N	1.8	5.2	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: None

CWE ids for CVE-2021-36133

CWE-732 Incorrect Permission Assignment for Critical Resource

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-36133

https://github.com/f-secure-foundry/advisories/blob/master/Security_Advisory-Ref_FSC-HWSEC-VR2021-0001-OP-TEE_TrustZone_bypass.txt

advisories/Security_Advisory-Ref_FSC-HWSEC-VR2021-0001-OP-TEE_TrustZone_bypass.txt at master · f-secure-foundry/advisories · GitHub
Third Party Advisory

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Vulnerability Details : CVE-2021-36133

Products affected by CVE-2021-36133

Exploit prediction scoring system (EPSS) score for CVE-2021-36133

CVSS scores for CVE-2021-36133

CWE ids for CVE-2021-36133

References for CVE-2021-36133