CVE-2020-12469 : Exploit Details and Defense Strategies

Subrion CMS through version 4.2.1 is vulnerable to PHP Object Injection in the admin/blocks.php file, allowing attackers to delete files via serialized data manipulation.

Understanding CVE-2020-12469

This CVE involves a security issue in Subrion CMS that enables PHP Object Injection, leading to file deletion through manipulated serialized data.

What is CVE-2020-12469?

The vulnerability in admin/blocks.php of Subrion CMS up to version 4.2.1 permits PHP Object Injection, allowing malicious actors to delete files by altering serialized data in the subpages value within a block to blocks/edit.

The Impact of CVE-2020-12469

The exploitation of this vulnerability can result in unauthorized file deletion, potentially causing data loss and system instability.

Technical Details of CVE-2020-12469

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in admin/blocks.php of Subrion CMS allows PHP Object Injection, enabling attackers to delete files by manipulating serialized data within a block's subpages value.

Affected Systems and Versions

Product: Subrion CMS
Vendor: N/A
Versions: Up to 4.2.1

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious serialized data into the subpages value within a block to trigger file deletion.

Mitigation and Prevention

Protecting systems from CVE-2020-12469 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Subrion CMS to the latest version to patch the vulnerability.
Monitor system logs for any suspicious activities indicating PHP Object Injection attempts.

Long-Term Security Practices

Implement input validation to prevent malicious data injection.
Conduct regular security audits to identify and address vulnerabilities proactively.

Patching and Updates

Apply security patches promptly to ensure the system is protected against known vulnerabilities.