Medium severity · published May 25, 2021
CVE-2021-27562
Arm Trusted Firmware Out-of-Bounds Write Vulnerability
In wildKEV
5.5
CVSS
3.1%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
TF
Trusted Firmware-m · Trustedfirmware
through 1.2.0 · source: NVD
TF
Trusted Firmware · Arm
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27562
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27562
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://developer.arm.com/support/arm-security-updates
x_refsource_CONFIRM
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/tree/docs/security/security_advisories/svc_caller_sp_fetching_vulnerability.rst
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