CVE-2021-27562: Arm Trusted Firmware Out-of-Bounds Write Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

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.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-27562

Weakness behind it

CISA records this vulnerability as an instance of CWE-787. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27562
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog