CVE-2023-37897 : Vulnerability Insights and Analysis

A server-side template injection vulnerability (SSTI) in Grav has been identified, allowing attackers to execute malicious payloads. Here is an overview of CVE-2023-37897 and how to mitigate the risks.

Understanding CVE-2023-37897

This section provides insight into the nature of the vulnerability and its impact on affected systems.

What is CVE-2023-37897?

Grav, a PHP-based file Web platform, is vulnerable to server-side template injection (SSTI). The issue arises from an incorrect return value in the

isDangerousFunction()

check, enabling the execution of payloads by appending double backslashes (

\\

). Attackers with certain levels of access can exploit this vulnerability.

The Impact of CVE-2023-37897

The vulnerability allows attackers with Administrator or specific user account access to execute malicious code. It affects Grav versions prior to 1.7.42.2.

Technical Details of CVE-2023-37897

Explore the specifics of the vulnerability, including how systems are affected and the mechanism of exploitation.

Vulnerability Description

The vulnerability in Grav stems from incorrect handling of dangerous functions, leading to SSTI and potential code execution. The issue was introduced in versions after 1.7.42.

Affected Systems and Versions

Grav versions below 1.7.42.2 are impacted by this vulnerability. Users with Administrator or specific user account access are at risk.

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating certain functions and injecting malicious payloads, leveraging the SSTI flaw.

Mitigation and Prevention

Discover the steps to mitigate the risks associated with CVE-2023-37897 and enhance the security posture of affected systems.

Immediate Steps to Take

Users are strongly advised to update their Grav installations to version 1.7.42.2 or later to address the vulnerability. Regularly monitor for security advisories and apply patches promptly.

Long-Term Security Practices

Implement robust access control measures, such as restricting Administrator privileges and employing secure coding practices to prevent injection attacks. Conduct regular security assessments to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security updates from Grav and promptly apply patches to address known vulnerabilities and enhance system security.