System Halt Vulnerability in Arm Trusted Firmware M by Arm
CVE-2021-27562

5.5MEDIUM

Key Information:

Vendor
Arm
Status
Trusted Firmware M
Vendor
CVE Published:
25 May 2021

Badges

👾 Exploit Exists🟣 EPSS 95%🦅 CISA Reported

Summary

The vulnerability in Arm Trusted Firmware M allows non-secure (NS) world components to interact improperly with secure functions while operating under the Non-Secure Privileged Exception (NSPE) handler mode. This interaction may lead to unexpected system halts, potential overwriting of secure data, or unauthorized printing of sensitive information, raising serious concerns regarding the integrity and confidentiality of secure operations.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

References

https://developer.arm.com/support/arm-security-updates
x_refsource_MISC
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.g...
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EPSS Score

95% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.