CVE-2025-57605

Executive Summary

CVE-2025-57605 is a critical authorization bypass vulnerability in the AiKaan IoT Platform. The platform fails to enforce server-side authorization checks on department admin assignment APIs. An authenticated user can escalate their privileges by assigning themselves as an administrator of any department, leading to unauthorized access to sensitive IoT device management functions, data exfiltration, and potential lateral movement within the platform. No public exploit code or patch is currently available, but the vulnerability is trivially exploitable via crafted API requests.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a server-side authorization flaw in a proprietary IoT platform.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): Low (L) – Attacker needs a valid low-privilege account.
• User Interaction (UI): None (N) – No user action needed.
• Scope (S): Unchanged (U) – The vulnerable component remains the same.
• Confidentiality (C): High (H) – Full access to department data.
• Integrity (I): High (H) – Ability to modify department configurations.
• Availability (A): High (H) – Potential to disrupt IoT device operations.

CVSS Score: 8.8 (High) – Unauthorized privilege escalation with full impact on confidentiality, integrity, and availability.

Deep Dive & Mechanics

The vulnerability resides in the API endpoints responsible for assigning department admin roles. The platform uses a role-based access control (RBAC) model but fails to validate that the requesting user has the authority to modify admin assignments for a target department. Specifically, the API does not check if the authenticated user is a super-admin or has administrative rights over the department they are trying to modify.

Attack Flow:

1. An attacker authenticates as a low-privilege user (e.g., a regular department member).
2. The attacker sends a PUT/POST request to /api/departments/{department_id}/admins with their own user ID.
3. The server accepts the request without verifying that the attacker has the manage_admins permission for that department.
4. The attacker is now an admin of the target department, gaining full control over IoT devices, user management, and data within that department.

Root Cause: Missing server-side authorization check on the assignAdmin function. The code likely only checks if the user is authenticated, not if they are authorized.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

// Vulnerable: No authorization check
app.put('/api/departments/:deptId/admins', authenticate, (req, res) => {
    const { userId } = req.body;
    // Directly assigns admin without checking if req.user has rights
    db.assignAdmin(req.params.deptId, userId);
    res.status(200).send('Admin assigned');
});

Patched Code (Conceptual):

// Patched: Authorization check added
app.put('/api/departments/:deptId/admins', authenticate, authorize('manage_admins', req.params.deptId), (req, res) => {
    const { userId } = req.body;
    db.assignAdmin(req.params.deptId, userId);
    res.status(200).send('Admin assigned');
});

The patched version uses an authorize middleware that checks if the authenticated user has the manage_admins permission for the specific department.

Exploitation & Lab Setup

Red Team

Prerequisites:

• Valid low-privilege credentials for the AiKaan IoT Platform.
• Network access to the platform's API endpoint.

Exploitation Steps:

1. Obtain a session token by logging in as a low-privilege user.
2. Identify a target department ID (e.g., via enumeration or from a list).
3. Send a PUT request to assign yourself as admin:

curl -X PUT https://target-iot-platform.com/api/departments/123/admins \
  -H "Authorization: Bearer <low_priv_token>" \
  -H "Content-Type: application/json" \
  -d '{"userId": "<your_user_id>"}'

4. Verify escalation by accessing department admin functions.

No public exploit code is available.

Blue Team

Detection:

• Monitor API logs for unauthorized admin assignment attempts (e.g., PUT requests to /api/departments/*/admins from non-admin users).
• Alert on any user who suddenly gains admin privileges across multiple departments.

Hunting:

• Query logs for userId changes in department admin assignments where the requesting user is not a super-admin.
• Look for anomalous API calls from low-privilege accounts to sensitive endpoints.

Indicators of Compromise (IOCs)

• Network IOCs:
  • PUT/POST requests to /api/departments/*/admins from non-admin IPs.
  • Repeated 200 responses to unauthorized admin assignment attempts.
• System IOCs:
  • Unexpected addition of user IDs to department admin lists.
  • Log entries showing assignAdmin function called by unauthorized users.
• Behavioral IOCs:
  • Low-privilege users suddenly accessing department-wide IoT device management features.

Detection Engineering

YARA Rule

rule CVE_2025_57605_AiKaan_PrivEsc {
    meta:
        description = "Detects exploitation attempts of CVE-2025-57605 in AiKaan IoT Platform logs"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-57605"
    strings:
        $api_endpoint = "/api/departments/" ascii wide nocase
        $admin_action = "admins" ascii wide nocase
        $http_method = "PUT" ascii wide nocase
    condition:
        all of them
}

Sigma Rule

title: CVE-2025-57605 - Unauthorized Department Admin Assignment
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit missing authorization in AiKaan IoT Platform department admin assignment API.
author: Valters IT
date: 2025-04-10
logsource:
    category: web_server
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'PUT'
        cs-uri-stem|contains: '/api/departments/'
        cs-uri-stem|endswith: '/admins'
    condition: selection
falsepositives:
    - Legitimate admin actions from authorized users
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2025-57605 - AiKaan IoT Platform Unauthorized Admin Assignment";
    flow:to_server,established;
    content:"PUT"; http_method;
    content:"/api/departments/"; http_uri;
    content:"/admins"; http_uri;
    sid:1000001;
    rev:1;
    reference:cve,2025-57605;
    classtype:attempted-admin;
    priority:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the vulnerable API endpoint if possible, or restrict access to super-admins only via network ACLs.
2. Implement a WAF rule to block PUT/POST requests to /api/departments/*/admins from non-admin IPs.
3. Audit all current department admin assignments to identify and revoke unauthorized privileges.

Long-Term Fix:

• Apply server-side authorization checks on all admin assignment APIs. Ensure the manage_admins permission is verified against the target department.
• Conduct a full RBAC audit of the platform.

No official patch is available from the vendor.

Valters IT