CVE-2021-22550 Enclave memory overwrite/overread vulnerability in Asylo UntrustedCacheMalloc::GetBuffer

Medium 6.5 Published 8 Jun 2021 Updated 16 Sep 2024

An attacker can overwrite arbitrary memory in secure enclaves by modifying pointers, potentially leading to code execution or data exposure.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-22550?

CVE-2021-22550 is a medium-severity memory corruption vulnerability in Google LLC Asylo, published on 8 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An attacker can modify the pointers in enclave memory to overwrite arbitrary memory addresses within the secure enclave. It is recommended to update past 0.6.3 or git commit https://github.com/google/asylo/commit/a47ef55db2337d29de19c50cd29b0deb2871d31c

Weakness: CWE-668, CWE-823

Which versions are affected by CVE-2021-22550?

It affects 1 product.

Products include Google Asylo.

How do I fix CVE-2021-22550?

No fix has been published for CVE-2021-22550 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-22550 being exploited?

There is no known exploitation of CVE-2021-22550 in the wild and no public exploit code.

Sources

Also known as GHSA-3rwv-g3jc-r7cc.