CVE-2024-53303: Remote Code Execution Vulnerability in LRQA Nettitude PoshC2

Overview

A critical vulnerability has been identified in the upload_file function of LRQA Nettitude PoshC2 software. Designated as CVE-2024-53303, this vulnerability allows authenticated attackers to execute arbitrary code remotely via a specially crafted POST request. Given the high potential for system compromise or data leakage, this vulnerability poses a significant risk to organizations using the affected software. Mitigation strategies are available and should be implemented promptly to prevent potential exploitation.

Vulnerability Summary

CVE ID: CVE-2024-53303
Severity: High (CVSS: 8.8)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: System Compromise and Data Leakage

Affected Products

Product | Affected Versions

LRQA Nettitude PoshC2 | Versions after commit 123db87

How the Exploit Works

The vulnerability lies in the upload_file function of the LRQA Nettitude PoshC2 software. An authenticated attacker can exploit this vulnerability by crafting a specific POST request. This crafted request can then be sent to the upload_file function, which, due to insufficient input validation, executes the arbitrary code embedded within the request. This code execution happens in the security context of the application, allowing the attacker to gain control over the system and potentially access sensitive data.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. This is a sample HTTP POST request that includes a malicious payload:

POST /upload_file HTTP/1.1
Host: target.example.com
Content-Type: application/json
Authorization: Bearer [Auth_Token]
{ "file": "malicious_code;" }

In this example, “malicious_code;” represents the arbitrary code that an attacker could embed within the POST request. Once the request is processed by the server, the malicious code is executed, leading to potential system compromise or data leakage.

Mitigation Guidance

To mitigate this vulnerability, users are advised to apply the vendor-supplied patch as soon as it becomes available. As a temporary solution, users can also utilize a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to identify and block attempts to exploit this vulnerability. Additional best practices include monitoring system logs for any unusual activity and revising user privileges to minimize potential damage.