CVE-2020-8936: Arbitrary enclave memory overwrite vulnerability in ECall ecall_restore
First published: Tue Dec 15 2020(Updated: )
An arbitrary memory overwrite vulnerability in Asylo versions up to 0.6.0 allows an attacker to make a host call to UntrustedCall. UntrustedCall failed to validate the buffer range within sgx_params and allowed the host to return a pointer that was an address within the enclave memory. This allowed an attacker to read memory values from within the enclave.
Credit: cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Google Products | <=0.6.0 |
Remedy
Upgrade past commit 83036fd841d33baa7e039f842d131aa7881fdcc2
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Frequently Asked Questions
What is the severity of CVE-2020-8936?
The severity of CVE-2020-8936 is considered high due to its potential for arbitrary memory overwrite.
How do I fix CVE-2020-8936?
To fix CVE-2020-8936, upgrade to Asylo version 0.6.1 or later where the vulnerability is addressed.
What versions of Asylo are affected by CVE-2020-8936?
CVE-2020-8936 affects all versions of Asylo up to and including 0.6.0.
What types of attacks is CVE-2020-8936 vulnerable to?
CVE-2020-8936 is vulnerable to arbitrary memory overwrite attacks that can lead to exposure of sensitive data.
Who is impacted by CVE-2020-8936?
Organizations using affected versions of Google Asylo for secure enclaves are impacted by CVE-2020-8936.
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