CVE-2021-26120 : What You Need to Know

Smarty before version 3.1.39 is vulnerable to code injection through unexpected function names specified after a {function name= substring. This vulnerability can be exploited by attackers for malicious purposes.

Understanding CVE-2021-26120

This section will cover the essential details regarding the Smarty vulnerability.

What is CVE-2021-26120?

The CVE-2021-26120 vulnerability exists in Smarty versions prior to 3.1.39, allowing threat actors to execute code injection attacks using unexpected function names appended after a {function name= substring.

The Impact of CVE-2021-26120

This security flaw can lead to code injection attacks, enabling attackers to manipulate the application's behavior, access sensitive data, and potentially take control of affected systems.

Technical Details of CVE-2021-26120

Here, we delve into the specifics of the CVE-2021-26120 vulnerability.

Vulnerability Description

The vulnerability in Smarty allows malicious actors to inject arbitrary code through a specific function name syntax, leading to unauthorized code execution.

Affected Systems and Versions

All versions of Smarty prior to 3.1.39 are affected by CVE-2021-26120, making them susceptible to exploitation if not promptly patched.

Exploitation Mechanism

Attackers can exploit this vulnerability by providing unexpected function names after {function name= in Smarty, allowing them to inject and execute malicious code.

Mitigation and Prevention

In this section, we discuss the necessary steps to mitigate the risks posed by CVE-2021-26120.

Immediate Steps to Take

Users and administrators are advised to upgrade their Smarty installations to version 3.1.39 or newer to address this vulnerability and prevent potential attacks.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and stay informed about security updates to ensure the ongoing protection of your systems.

Patching and Updates

Stay vigilant for security advisories and promptly apply patches released by Smarty to eliminate this vulnerability and enhance the security of your applications and systems.