CVE-2021-22552 : Vulnerability Insights and Analysis

Asylo version up to 0.6.1 is impacted by an untrusted memory read vulnerability allowing attackers to read memory from within the enclave. It is advised to update to Asylo 0.6.3 or later.

Understanding CVE-2021-22552

This CVE relates to a memory overread vulnerability in Asylo version 0.6.2.

What is CVE-2021-22552?

An untrusted memory read vulnerability in Asylo versions up to 0.6.1 allows attackers to pass a syscall number in MessageReader that can bypass validation, enabling them to read memory from within the secure enclave.

The Impact of CVE-2021-22552

The vulnerability poses a medium severity risk, with high confidentiality impact and low integrity impact.

Technical Details of CVE-2021-22552

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows untrusted attackers to exploit a memory read issue in Asylo 0.6.2, potentially leaking sensitive information.

Affected Systems and Versions

Asylo versions up to 0.6.1 are affected by this vulnerability, while Asylo 0.6.3 and later versions are secure.

Exploitation Mechanism

Attackers can exploit this vulnerability by passing a syscall number in MessageReader to read memory within the secure enclave.

Mitigation and Prevention

Here are some steps to mitigate the risks associated with CVE-2021-22552.

Immediate Steps to Take

Users are advised to update Asylo to version 0.6.3 or later to prevent exploitation of this vulnerability.

Long-Term Security Practices

Regularly update and patch software to ensure the latest security measures are in place.

Patching and Updates

Stay informed about security updates from Asylo and apply patches promptly to protect against potential exploits.