Buffer overflow in Trustedfirmware Trusted_firmware-m
CVE-2021-27562
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.
Vulnerability class: Buffer Overflow
EPSS: 0.511 (97.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Trustedfirmware Trusted_firmware-m
- N/a — versions n/a
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Permissions Required, x_refsource_CONFIRM, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-27562?
- CVE-2021-27562 is a medium-severity vulnerability in Trustedfirmware Trusted_firmware-m, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-05-25.
- How severe is CVE-2021-27562?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-27562 known to be exploited?
- Yes. CVE-2021-27562 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.