Vulnerability Monitor

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CVE-2020-16273

In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.

Published

2020-11-12T19:15:14.583

Last Modified

2024-11-21T05:07:04.670

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

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

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

Exploitability Score

3.9

Impact Score

10.0

Weaknesses

Type: Primary
CWE-191

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	arm	armv8-m_firmware	*	Yes
Hardware	arm	armv8-m	-	No

References

https://developer.arm.com/support/arm-security-updates/armv8-m-stack-sealing Vendor Advisory ([email protected])
https://developer.arm.com/support/arm-security-updates/armv8-m-stack-sealing Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)