CVE-2020-8905 Confidential Information Disclosure vulnerability in Asylo
An attacker can read trusted memory data by exploiting a buffer length validation flaw in the Asylo library's network receive function.
- 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-2020-8905?
CVE-2020-8905 is a low-severity vulnerability in Google LLC Asylo, published on 12 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The 'enc_untrusted_recvfrom' function generates a return value which is deserialized by 'MessageReader', and copied into three different 'extents'. The length of the third 'extents' is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later.
Weakness: CWE-120
Which versions are affected by CVE-2020-8905?
It affects 1 product.
Products include Google Asylo.
How do I fix CVE-2020-8905?
No fix has been published for CVE-2020-8905 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-8905 being exploited?
There is no known exploitation of CVE-2020-8905 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-2021-22552 Memory overread secure enclave in Asylo 0.6.2
Sources
Also known as GHSA-xr5f-j5gc-qw6j.