CVE-2023-49283 : Security Advisory and Response

This article provides detailed information about CVE-2023-49283, a vulnerability in the Microsoft Graph PHP SDK.

Understanding CVE-2023-49283

CVE-2023-49283 involves a security issue in the Microsoft Graph PHP SDK package that exposes the phpInfo() function in a test code file, potentially leaking sensitive system information.

What is CVE-2023-49283?

The vulnerability in the Microsoft Graph PHP SDK allows unauthorized actors to access and execute the phpInfo() function, exposing system information. It requires a specific server misconfiguration to be exploitable.

The Impact of CVE-2023-49283

If exploited, an attacker can view sensitive system details like configuration, modules, and environment variables, potentially leading to unauthorized access and data theft.

Technical Details of CVE-2023-49283

The vulnerability affects the

GetPhpInfo.php

script in versions below 2.0.2 of the Microsoft Graph PHP SDK, requiring a server misconfiguration to run malicious code.

Vulnerability Description

The vulnerable code allows the execution of the phpInfo() function, enabling attackers to retrieve system information remotely.

Affected Systems and Versions

Versions prior to 2.0.2 of the Microsoft Graph PHP SDK are affected by this vulnerability.

Exploitation Mechanism

Exploiting CVE-2023-49283 requires exposing the PHP application's

/vendor

directory to the web, allowing attackers to craft HTTP requests to execute the phpInfo() method.

Mitigation and Prevention

After the vulnerability was discovered, it has been patched in version 2.0.2 of the Microsoft Graph PHP SDK. For immediate protection, users are advised to update to the patched version.

Immediate Steps to Take

Temporary workarounds include deleting the vulnerable

GetPhpInfo.php

file, restricting access to the

/vendor

directory, or disabling the phpInfo function.

Long-Term Security Practices

To prevent similar vulnerabilities, regularly update software packages, follow secure coding practices, and conduct security audits.

Patching and Updates

Stay informed about security updates and promptly apply patches released by software vendors to mitigate security risks.