CVE-2023-39834 - PbootCMS below v3.2. Command Injection Vulnerability via create

Hello, fellow security enthusiasts! Today we will discuss a command injection vulnerability in PbootCMS, a widely used open-source PHP-based content management system. This vulnerability, CVE-2023-39834, affects versions of PbootCMS below v3.2.. Researchers have discovered a command injection vulnerability via the create_function feature.

Exploit Details

A command injection flaw allows an attacker to execute arbitrary commands on the targeted system. The vulnerability is introduced by incorrect handling of user-supplied input and can result in a complete compromise of the server if exploited successfully.

In the case of PbootCMS, the vulnerable code lies in the create_function feature. By manipulating user input, an attacker can inject arbitrary PHP code into the create_function method, resulting in the execution of arbitrary commands.

Here's an example of a PHP code snippet containing a vulnerable create_function method

$user_defined_data = $_GET['data'];
$function_example = create_function('$x', $user_defined_data);

In this example, an attacker could potentially manipulate the GET request data parameter to inject malicious code, leading to arbitrary command execution.

The Patch

The developers behind PbootCMS acknowledged the vulnerability and released a patch to fix the security issue in version 3.2.. The patch can be found at the following links:

- PbootCMS GitHub Release Page
- PbootCMS Official Website

We recommend updating to the latest version of PbootCMS immediately to mitigate the risk associated with this vulnerability.

Original References

The security researcher who discovered this vulnerability has published a detailed write-up and proof-of-concept exploit code. You can read more about their findings at the following link:

- CVE-2023-39834: PbootCMS below v3.2. Command Injection Vulnerability

Conclusion

CVE-2023-39834 is a critical command injection vulnerability in PbootCMS below v3.2., which can lead to a complete compromise of the affected server. It is essential to apply the necessary security patch promptly and keep your content management system up to date to stay protected against these types of threats.

Timeline

Published on: 08/24/2023 18:15:07 UTC
Last modified on: 08/29/2023 17:38:25 UTC