CVE-2021-27562 Arm Trusted Firmware Out-of-Bounds Write
Attackers in the non-secure world can trigger system halts, overwrite secure data, or leak secure data via secure function calls.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27562?
CVE-2021-27562 is a medium-severity memory corruption vulnerability in n/a, published on 25 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2021-27562?
It affects 1 product.
Products include Trustedfirmware Trusted Firmware-M.
How do I fix CVE-2021-27562?
No fix has been published for CVE-2021-27562 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-27562 being exploited?
Yes. Attackers have exploited CVE-2021-27562 in the wild since at least 3 Nov 2021.
Other vulnerabilities in n/a
Sources
Also known as GHSA-3352-gx8m-f7v5.