CVE-2020-15227 : Vulnerability Insights and Analysis

Nette versions before 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, 3.0.6 are vulnerable to a code injection attack that can lead to Remote Code Execution (RCE).

Understanding CVE-2020-15227

This CVE identifies a Remote Code Execution vulnerability in Nette, a PHP/Composer MVC Framework.

What is CVE-2020-15227?

CVE-2020-15227 refers to a security flaw in Nette versions prior to 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, and 3.0.6 that allows attackers to execute arbitrary code remotely.

The Impact of CVE-2020-15227

The vulnerability has a CVSS base score of 8.7, indicating a high severity level with significant impacts on confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2020-15227

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability stems from improper neutralization of special elements in output used by a downstream component, enabling injection attacks.

Affected Systems and Versions

Application: Nette
Vendor: Nette
Vulnerable Versions:
= 2.0.0, < 2.0.19

= 2.1.0, < 2.1.13

= 2.2.0, < 2.2.10

= 2.3.0, < 2.3.14

= 2.4.0, < 2.4.16

= 3.0.0, < 3.0.6

Exploitation Mechanism

Attackers can exploit this vulnerability by passing specially crafted parameters via URLs, potentially leading to Remote Code Execution.

Mitigation and Prevention

Protecting systems from CVE-2020-15227 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Nette to versions 2.0.19, 2.1.13, 2.2.10, 2.3.14, 2.4.16, or 3.0.6 to mitigate the vulnerability.
Monitor and restrict access to URLs that accept parameters.

Long-Term Security Practices

Implement input validation mechanisms to sanitize user inputs.
Regularly audit and review code for security vulnerabilities.

Patching and Updates

Apply security patches provided by Nette promptly to address the vulnerability.