CVE-2021-27562 : In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, a

In Arm Trusted Firmware M through 1.2, the NS world may trigger a system halt, an overwrite of secure data, or the printing out of secure data when calling secure functions under the NSPE handler mode.

Published 2021-05-25 19:15:08

Updated 2021-06-08 18:25:13

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory Corruption

Products affected by CVE-2021-27562

ARM » Trusted Firmware M
Versions up to, including, (<=) 1.2
cpe:2.3:o:arm:trusted_firmware_m:*:*:*:*:*:*:*:*
Matching versions
When used together with: ARM » Trusted Firmware M » Version: N/A

CVE-2021-27562 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Arm Trusted Firmware Out-of-Bounds Write Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

Arm Trusted Firmware contains an out-of-bounds write vulnerability allowing the non-secure (NS) world to trigger a system halt, overwrite secure data, or print out secure data when calling secure functions under the non-secure processing environment (NSPE) handler mode. This vulnerability affects Ye

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2021-27562

Added on 2021-11-03 Action due date 2021-11-17

Exploit prediction scoring system (EPSS) score for CVE-2021-27562

EPSS FAQ

95.41%

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

~ 99 %

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

CVSS scores for CVE-2021-27562

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.9	MEDIUM	AV:L/AC:L/Au:N/C:N/I:N/A:C	3.9	6.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-27562

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-27562

https://developer.arm.com/support/arm-security-updates

Arm Security Updates – Arm Developer
Vendor Advisory

CVEs referencing this url
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst

svc_caller_sp_fetching_vulnerability.rst « security_advisories « security « docs - trusted-firmware-m.git - Trusted Firmware for M profile Arm CPUs
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