CVE-2020-8905 : What You Need to Know
Discover the impact of CVE-2020-8905, a vulnerability in Asylo versions prior to 0.6.0 allowing unauthorized data access. Learn about affected systems, exploitation, and mitigation steps.
A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows unauthorized data access. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2020-8905
What is CVE-2020-8905?
CVE-2020-8905 is a vulnerability in Asylo versions before 0.6.0 that enables attackers to read sensitive data by manipulating memory copying processes.
The Impact of CVE-2020-8905
The vulnerability allows attackers to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length, leading to potential data exposure.
Technical Details of CVE-2020-8905
Vulnerability Description
The 'enc_untrusted_recvfrom' function in Asylo generates a return value deserialized by 'MessageReader' and copied into 'extents', with the length of the third 'extents' controlled by external inputs.
Affected Systems and Versions
- Product: Asylo
- Vendor: Google LLC
- Versions Affected: < 0.6.0
Exploitation Mechanism
The vulnerability arises from the lack of validation on the length of the third 'extents', allowing attackers to manipulate memory copying operations.
Mitigation and Prevention
Immediate Steps to Take
- Update Asylo to version 0.6.0 or later to mitigate the vulnerability.
Long-Term Security Practices
- Regularly monitor and update software versions to address security flaws.
- Implement secure coding practices to prevent buffer overflow vulnerabilities.
Patching and Updates
Stay informed about security patches and updates for Asylo to address known vulnerabilities.