CVE-2019-9642 : Vulnerability Insights and Analysis

A vulnerability was found in proxy.php in pydio-core in Pydio versions up to 8.2.2, allowing an attacker to execute arbitrary PHP code through an unauthenticated request.

Understanding CVE-2019-9642

This CVE identifies a security issue in Pydio that enables the execution of malicious PHP code.

What is CVE-2019-9642?

The vulnerability in proxy.php in Pydio versions up to 8.2.2 allows attackers to run arbitrary PHP code through unauthenticated requests.

The Impact of CVE-2019-9642

The vulnerability permits the execution of unauthorized PHP code, potentially leading to severe security breaches and unauthorized access to sensitive information.

Technical Details of CVE-2019-9642

This section delves into the technical aspects of the CVE.

Vulnerability Description

The flaw in proxy.php in Pydio versions up to 8.2.2 enables threat actors to execute malicious PHP code by inserting it on the fourth line of a .php file.

Affected Systems and Versions

Product: Pydio
Vendor: Pydio
Versions affected: Up to 8.2.2

Exploitation Mechanism

Attackers can exploit this vulnerability by sending an unauthenticated request to execute arbitrary PHP code.
The attack involves inserting malicious code on the fourth line of a .php file.
A proof of concept (PoC.php) was created by the guest account to demonstrate the exploit.
Code execution is triggered by requesting proxy.php?hash=../../../../../var/lib/pydio/data/personal/guest/PoC.php.
This vulnerability is linked to the file plugins/action.share/src/Store/ShareStore.php.

Mitigation and Prevention

Protecting systems from CVE-2019-9642 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Pydio to version 8.2.3 or later to patch the vulnerability.
Monitor and restrict access to sensitive files and directories.
Implement proper input validation to prevent code injection attacks.

Long-Term Security Practices

Regularly audit and review code for vulnerabilities.
Educate users on secure coding practices and the risks of unvalidated inputs.
Employ a robust security testing process to identify and remediate vulnerabilities.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.