CVE-2023-44469 : Exploit Details and Defense Strategies

A Server-Side Request Forgery vulnerability in the OpenID Connect Issuer in LemonLDAP::NG before version 2.17.1 has been identified, allowing authenticated remote attackers to send GET requests to arbitrary URLs using the request_uri authorization parameter. This vulnerability is akin to CVE-2020-10770.

Understanding CVE-2023-44469

This section delves into the details of the CVE-2023-44469 vulnerability.

What is CVE-2023-44469?

The CVE-2023-44469 vulnerability pertains to a Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before version 2.17.1. It enables authenticated remote attackers to send GET requests to arbitrary URLs through the request_uri authorization parameter.

The Impact of CVE-2023-44469

This vulnerability could be exploited by malicious actors to manipulate the server into making requests to internal resources, potentially leading to unauthorized access, data leakage, or further exploitation.

Technical Details of CVE-2023-44469

In this section, we explore the technical aspects of CVE-2023-44469.

Vulnerability Description

The vulnerability allows authenticated remote attackers to abuse the request_uri parameter, sending GET requests to any URL of their choosing.

Affected Systems and Versions

Vendor and product information is not disclosed, indicating a potential impact on any system running the vulnerable version of LemonLDAP::NG prior to 2.17.1.

Exploitation Mechanism

Malicious users can exploit this vulnerability by leveraging an authenticated session to send crafted requests to the LemonLDAP::NG server, tricking it into communicating with external entities.

Mitigation and Prevention

Taking immediate mitigation steps and implementing long-term security practices can help safeguard systems against CVE-2023-44469.

Immediate Steps to Take

Update LemonLDAP::NG to version 2.17.1 or later to patch the vulnerability.
Monitor and restrict external requests made by the server to mitigate attack surface.

Long-Term Security Practices

Implement stringent input validation to prevent unauthorized URLs in requests.
Educate users on safe authorization practices to minimize the risk of SSRF attacks.

Patching and Updates

Regularly apply security updates and patches provided by LemonLDAP::NG to ensure continued protection against known vulnerabilities.