CVE-2021-27562

Arm Trusted Firmware Out-of-Bounds Write Vulnerability

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

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.

En Arm Trusted Firmware M versión hasta 1.2, el mundo NS puede activar una detención del sistema, una sobrescritura de datos seguros o la impresión de datos seguros al llamar a funciones seguras en el modo de controlador NSPE

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 Yealink Device Management servers.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-02-22 CVE Reserved
2021-05-25 CVE Published
2021-11-03 Exploited in Wild
2021-11-17 KEV Due Date
2024-03-05 EPSS Updated
2024-08-03 CVE Updated
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (2)

URL	Tag	Source
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://developer.arm.com/support/arm-security-updates	2021-06-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Arm Search vendor "Arm"	Trusted Firmware M Search vendor "Arm" for product "Trusted Firmware M"	<= 1.2 Search vendor "Arm" for product "Trusted Firmware M" and version " <= 1.2"	-	Affected	in	Arm Search vendor "Arm"	Trusted Firmware M Search vendor "Arm" for product "Trusted Firmware M"	-	-	Safe