CVE-2024-32407

Executive Summary

CVE-2024-32407 is a critical security vulnerability in the inducer relate application, affecting versions prior to 2024.1. The flaw resides in the Page Sandbox feature, allowing a remote attacker to execute arbitrary code by sending a crafted payload. This vulnerability can lead to full system compromise, data exfiltration, and lateral movement within the network. No public proof-of-concept (PoC) or exploit code has been released at this time, but the risk remains high due to the nature of the attack vector.

Supply Chain & Package Security

This vulnerability affects the inducer relate package, which is distributed via PyPI. Users should verify the integrity of their installed packages and ensure they are using version 2024.1 or later. The package maintainer has not released a detailed advisory, but upgrading to the latest version is the recommended mitigation.

CVSS Breakdown & Threat Level

The CVSS score is currently 0.0 due to insufficient data from the NVD. However, based on the description and attack vector, the vulnerability is likely critical. A plausible CVSS vector would be:

• 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)

Deep Dive & Mechanics

The vulnerability exists in the Page Sandbox feature of inducer relate. This feature allows users to create and test pages in a sandboxed environment. However, due to insufficient input validation and sanitization, an attacker can inject arbitrary code (e.g., Python, JavaScript, or shell commands) that is executed on the server.

The attack flow is as follows:

1. The attacker identifies a target running inducer relate version < 2024.1.
2. The attacker crafts a malicious payload (e.g., a Python script or shell command) and sends it to the Page Sandbox endpoint.
3. The server processes the payload without proper sanitization, leading to remote code execution (RCE).
4. The attacker gains a foothold on the server and can escalate privileges, move laterally, or exfiltrate data.

The root cause is a lack of input validation and the use of unsafe functions (e.g., eval(), exec(), or os.system()) in the sandbox processing logic.

Vulnerable vs. Patched Code

Vulnerable Code (version < 2024.1):

# Vulnerable sandbox processing
def process_sandbox(payload):
    # No input validation
    result = eval(payload)  # Dangerous
    return result

Patched Code (version 2024.1):

# Patched sandbox processing
import ast
def process_sandbox(payload):
    # Validate and sanitize input
    try:
        tree = ast.parse(payload, mode='eval')
        # Only allow safe operations
        for node in ast.walk(tree):
            if isinstance(node, (ast.Call, ast.Attribute)):
                raise ValueError("Unsafe operation detected")
        result = eval(compile(tree, '<string>', 'eval'))
        return result
    except Exception as e:
        return str(e)

The patched version uses ast.parse() to validate the payload and restricts unsafe operations, preventing arbitrary code execution.

Exploitation & Lab Setup

Red Team (Attacker)

Lab Setup:

1. Deploy a vulnerable instance of inducer relate (version < 2024.1) in a controlled environment.
2. Use a tool like curl or a Python script to send a crafted payload to the Page Sandbox endpoint.

Exploit Payload Example:

import requests

target_url = "http://target.com/sandbox"
payload = "__import__('os').system('id')"  # Example: execute 'id' command

response = requests.post(target_url, data={"payload": payload})
print(response.text)

Expected Output:

uid=1000(user) gid=1000(user) groups=1000(user)

Blue Team (Defender)

Detection Steps:

1. Monitor logs for unusual POST requests to the /sandbox endpoint.
2. Look for payloads containing dangerous functions like __import__, os.system, subprocess, or eval.
3. Use the detection rules provided in the Detection Engineering section.

Mitigation Steps:

1. Immediately upgrade to version 2024.1 or later.
2. If upgrading is not possible, implement a Web Application Firewall (WAF) rule to block suspicious payloads.
3. Restrict network access to the sandbox endpoint to trusted IPs only.

Indicators of Compromise (IOCs)

• Network IOCs:
  • POST requests to /sandbox with payloads containing __import__, os.system, subprocess, or eval.
  • Outbound connections to unknown IPs or domains from the server.
• File IOCs:
  • Unexpected files in /tmp/ or /var/tmp/ with suspicious names (e.g., exploit.py, shell.sh).
  • Modified system binaries or configuration files.
• Process IOCs:
  • Unusual processes spawned by the web server (e.g., python -c, bash -i).
  • Reverse shell processes (e.g., nc, bash -c).

Detection Engineering

YARA Rule

rule CVE_2024_32407_Inducer_RCE {
    meta:
        description = "Detects payloads targeting CVE-2024-32407 in inducer relate"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-32407"
    strings:
        $dangerous1 = "__import__" ascii wide
        $dangerous2 = "os.system" ascii wide
        $dangerous3 = "subprocess" ascii wide
        $dangerous4 = "eval(" ascii wide
        $dangerous5 = "exec(" ascii wide
    condition:
        any of ($dangerous*)
}

Sigma Rule

title: CVE-2024-32407 Inducer Relate RCE Detection
id: 12345678-1234-1234-1234-123456789abc
status: experimental
description: Detects POST requests to the sandbox endpoint with malicious payloads
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/sandbox'
        cs-uri-query|contains:
            - '__import__'
            - 'os.system'
            - 'subprocess'
            - 'eval('
            - 'exec('
    condition: selection
falsepositives:
    - Legitimate use of sandbox with safe payloads
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-32407 Inducer Relate RCE Attempt"; flow:to_server; content:"POST"; http_method; content:"/sandbox"; http_uri; content:"__import__"; nocase; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action: Upgrade to inducer relate version 2024.1 or later.
2. Workaround: If upgrading is not possible, disable the Page Sandbox feature or restrict access to it via firewall rules.
3. Long-term: Implement input validation and sanitization for all user-supplied data. Use safe functions like ast.literal_eval() instead of eval().
4. Monitoring: Deploy the detection rules provided above to identify exploitation attempts.
5. Incident Response: If exploitation is suspected, isolate the affected system, collect forensic evidence, and review logs for lateral movement.

Valters IT
Securing Your Digital Frontier