CVE-2021-22552 Memory overread secure enclave in Asylo 0.6.2
An attacker can read memory from within the secure enclave by bypassing syscall validation, exposing sensitive data.
- 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-2021-22552?
CVE-2021-22552 is a medium-severity vulnerability in Google LLC Asylo, published on 2 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows an untrusted attacker to pass a syscall number in MessageReader that is then used by sysno() and can bypass validation. This can allow the attacker to read memory from within the secure enclave. We recommend updating to Asylo 0.6.3 or past https://github.com/google/asylo/commit/90d7619e9dd99bcdb6cd28c7649d741d254d9a1a
Which versions are affected by CVE-2021-22552?
It affects 1 product.
Products include Google Asylo.
How do I fix CVE-2021-22552?
No fix has been published for CVE-2021-22552 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-22552 being exploited?
There is no known exploitation of CVE-2021-22552 in the wild and no public exploit code.
Other vulnerabilities in Google LLC Asylo
- CVE-2021-22548 Arbitrary enclave memory overread vulnerability in Asylo TrustedPrimitives::UntrustedCall
- CVE-2021-22549 Arbitrary enclave memory overwrite vulnerability in Asylo TrustedPrimitives::UntrustedCall
- CVE-2021-22550 Enclave memory overwrite/overread vulnerability in Asylo UntrustedCacheMalloc::GetBuffer
- CVE-2020-8904 Arbitrary trusted memory overwrite vulnerability in Asylo
- CVE-2020-8935 Memory corruption in Asylo
Sources
Also known as GHSA-wjwj-7rpq-5gg8.