CVE-2020-28644 : Exploit Details and Defense Strategies

A CSRF token check vulnerability in ownCloud/core version < 10.6 could allow attackers to forge requests against certain ocs API endpoints.

Understanding CVE-2020-28644

This CVE involves a security flaw in the CSRF token check mechanism of ownCloud/core version < 10.6, potentially enabling Cross-Site Request Forgery attacks.

What is CVE-2020-28644?

The CSRF (Cross Site Request Forgery) token check was improperly implemented on cookie authenticated requests against some ocs API endpoints, affecting ownCloud/core version < 10.6.

The Impact of CVE-2020-28644

Attackers could exploit this vulnerability to perform unauthorized actions on behalf of authenticated users.
Malicious actors may manipulate requests to the affected API endpoints, leading to data theft or unauthorized modifications.

Technical Details of CVE-2020-28644

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The CSRF token check was not correctly enforced on requests authenticated via cookies to specific ocs API endpoints in ownCloud/core version < 10.6.

Affected Systems and Versions

ownCloud/core version < 10.6 is confirmed to be impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this issue by crafting malicious requests against the vulnerable API endpoints, leveraging the lack of proper CSRF token validation.

Mitigation and Prevention

Protecting systems from CVE-2020-28644 requires immediate actions and long-term security measures.

Immediate Steps to Take

Upgrade ownCloud/core to version 10.6 or newer to mitigate the CSRF vulnerability.
Monitor and restrict access to sensitive API endpoints to prevent unauthorized requests.

Long-Term Security Practices

Implement multi-factor authentication to enhance user verification and prevent unauthorized access.
Regularly audit and review security configurations to identify and address potential vulnerabilities.

Patching and Updates

Stay informed about security advisories from ownCloud and promptly apply patches and updates to address known vulnerabilities.