CVE-2020-8021 Explained : Impact and Mitigation

A vulnerability in Open Build Service allows unauthorized access to files when sourceaccess is disabled, potentially leading to information disclosure.

Understanding CVE-2020-8021

This CVE involves an Improper Access Control vulnerability in Open Build Service, impacting versions prior to 2.10.5.

What is CVE-2020-8021?

This vulnerability allows remote attackers to read files of an OBS package where sourceaccess is disabled.

The Impact of CVE-2020-8021

CVSS Base Score: 5.3 (Medium)
Attack Vector: Network
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
Scope: Unchanged
Attackers can exploit this vulnerability to access sensitive information.

Technical Details of CVE-2020-8021

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from improper access control in Open Build Service, enabling unauthorized file access.

Affected Systems and Versions

Affected Product: Open Build Service
Vendor: openSUSE
Vulnerable Versions: Prior to 2.10.5

Exploitation Mechanism

Attackers can exploit a crafted _service file to gain unauthorized access to files where sourceaccess is disabled.

Mitigation and Prevention

Protect your systems from CVE-2020-8021 with these mitigation strategies.

Immediate Steps to Take

Update Open Build Service to version 2.10.5 or later.
Monitor and restrict access to sensitive files.
Implement proper access controls and permissions.

Long-Term Security Practices

Regularly audit and review access controls.
Conduct security training for developers and administrators.
Stay informed about security updates and best practices.

Patching and Updates

Apply security patches promptly.
Keep Open Build Service and related software up to date to prevent vulnerabilities.