CVE-2022-45152 : Vulnerability Insights and Analysis

A blind Server-Side Request Forgery (SSRF) vulnerability was found in Moodle due to insufficient validation of user-supplied input in the LTI provider library. This flaw allows a remote attacker to perform SSRF attacks by sending a specially crafted HTTP request.

Understanding CVE-2022-45152

This CVE-2022-45152 pertains to a blind Server-Side Request Forgery (SSRF) vulnerability discovered in Moodle, impacting certain versions of the software.

What is CVE-2022-45152?

The vulnerability in Moodle is a result of insufficient validation of user-supplied input in the LTI provider library, not utilizing Moodle's inbuilt cURL helper. This oversight poses a blind SSRF risk where an attacker can trick the application into initiating requests to arbitrary systems, potentially leading to unauthorized access.

The Impact of CVE-2022-45152

This vulnerability in Moodle allows a remote attacker to exploit SSRF, posing a significant security risk. By sending a manipulated HTTP request, the attacker can manipulate the application to make requests to unintended systems, potentially leading to further attacks.

Technical Details of CVE-2022-45152

This section provides a deeper look into the vulnerability, its affected systems, and the mechanism of exploitation.

Vulnerability Description

The blind SSRF vulnerability in Moodle arises from the lack of proper validation of user input in the LTI provider library. This allows attackers to craft malicious HTTP requests, tricking the application into making unauthorized requests to external systems.

Affected Systems and Versions

Moodle versions affected by this vulnerability include Moodle 4.0.5, Moodle 3.11.11, and Moodle 3.9.18. Systems running these versions are at risk of exploitation unless the necessary updates are applied.

Exploitation Mechanism

By sending a specially crafted HTTP request, an attacker can manipulate Moodle to make unauthorized requests to arbitrary systems, thereby exploiting the blind SSRF vulnerability.

Mitigation and Prevention

To safeguard against CVE-2022-45152, immediate actions should be taken to mitigate the risk and prevent potential exploitation.

Immediate Steps to Take

Update Moodle to the fixed versions (Moodle 4.0.5, Moodle 3.11.11, Moodle 3.9.18) to address the vulnerability.
Monitor network activity and investigate any suspicious requests to prevent SSRF attacks.

Long-Term Security Practices

Implement strict input validation and security measures to prevent SSRF vulnerabilities.
Regularly apply security patches and updates to keep systems secure.

Patching and Updates

Stay informed about security advisories from Moodle and apply patches promptly to ensure that known vulnerabilities are addressed.