CVE-2026-2697

Executive Summary

CVE-2026-2697 is an Insecure Direct Object Reference (IDOR) vulnerability in the Security Center application. An authenticated remote attacker can manipulate the owner parameter to escalate privileges, potentially gaining unauthorized access to resources or actions reserved for higher-privileged users. The vulnerability has a CVSS score of 6.3 (Medium), indicating a moderate risk. A patch is available from the vendor.

Supply Chain & Package Security

This vulnerability is not related to an open-source package (NPM, PyPI, Go, Ruby). It affects a proprietary Security Center application. Supply chain risks are limited to the vendor's update distribution channel.

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 valid credentials.
• User Interaction (UI): None (N) - No user action needed.
• Scope (S): Unchanged (U) - Exploit does not affect other components.
• Confidentiality (C): High (H) - Potential for unauthorized data access.
• Integrity (I): Low (L) - Limited ability to modify data.
• Availability (A): Low (L) - Limited impact on service availability.

Threat Level: Medium. The requirement for authentication reduces the attack surface, but the potential for privilege escalation makes it a significant risk for internal networks.

Deep Dive & Mechanics

The vulnerability lies in how the Security Center handles the owner parameter during resource creation or modification. The application fails to verify that the authenticated user has the right to set the owner field to a value corresponding to a higher-privileged user (e.g., an administrator).

Attack Flow:

1. An attacker authenticates as a low-privileged user (e.g., user1).
2. The attacker sends a crafted HTTP request (e.g., POST or PUT) to an endpoint that creates or updates a resource (e.g., a report, alert, or user object).
3. In the request body or parameters, the attacker sets the owner parameter to the ID or username of a high-privileged user (e.g., admin).
4. The server processes the request without proper authorization checks, associating the resource with the high-privileged user.
5. The attacker can then access or manipulate the resource as if they were the high-privileged user, effectively escalating their privileges.

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual):

def create_resource(request):
    resource = Resource()
    resource.name = request.POST['name']
    resource.owner = request.POST['owner']  # No authorization check
    resource.save()
    return HttpResponse("Resource created")

Patched Code (Conceptual):

def create_resource(request):
    resource = Resource()
    resource.name = request.POST['name']
    # Verify that the current user is allowed to set this owner
    if request.user.role != 'admin' and request.POST['owner'] != request.user.id:
        return HttpResponseForbidden("Unauthorized")
    resource.owner = request.POST['owner']
    resource.save()
    return HttpResponse("Resource created")

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Deploy a vulnerable instance of Security Center (version prior to patch).
2. Create two user accounts: attacker (low-privileged) and admin (high-privileged).
3. Authenticate as attacker and obtain a session token.

Exploitation Steps:

1. Identify an endpoint that accepts the owner parameter (e.g., /api/resources/create).
2. Craft a POST request with the owner parameter set to the admin's user ID.
3. Send the request using a tool like curl:

   curl -X POST https://target.com/api/resources/create \
     -H "Authorization: Bearer <attacker_token>" \
     -d "name=test&owner=admin_user_id"
   

4. Verify that the resource is created and associated with the admin user.
5. Access the resource to confirm privilege escalation.

Blue Team (Defensive)

Detection:

• Monitor for unusual owner parameter values in API requests.
• Alert on requests where a low-privileged user sets the owner to a different user.
• Review logs for failed authorization attempts related to resource ownership.

Mitigation:

• Apply the vendor patch immediately.
• Implement strict server-side authorization checks for all resource operations.
• Use role-based access control (RBAC) to enforce ownership rules.

Indicators of Compromise (IOCs)

• Network: HTTP requests with owner parameter set to a user ID different from the authenticated user.
• Logs: Server logs showing owner parameter manipulation by low-privileged users.
• System: Resources (e.g., reports, alerts) owned by unexpected users.

Detection Engineering

YARA Rule

rule Detect_IDOR_Owner_Parameter {
    meta:
        description = "Detects potential IDOR exploitation via owner parameter"
        author = "Valters IT"
        date = "2026-01-01"
        cve = "CVE-2026-2697"
    strings:
        $owner_param = "owner="
        $user_id = /owner=[a-zA-Z0-9_-]+/
    condition:
        $owner_param and #user_id > 1
}

Sigma Rule

title: IDOR Exploitation via Owner Parameter
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects attempts to exploit CVE-2026-2697 by manipulating the owner parameter
author: Valters IT
date: 2026/01/01
logsource:
    category: web
    product: security_center
detection:
    selection:
        http.method: 'POST'
        http.url: '/api/resources/create'
        http.body: 'owner='
    condition: selection
falsepositives:
    - Legitimate admin actions
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2026-2697 - IDOR Owner Parameter Exploitation";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/api/resources/create"; http_uri;
    content:"owner="; http_client_body;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

1. Immediate: Apply the vendor patch to all affected Security Center instances.
2. Short-term: Implement strict server-side authorization checks for all resource operations involving the owner parameter.
3. Long-term: Conduct a security audit of all API endpoints to ensure proper access controls.
4. Compensating Controls: Use a Web Application Firewall (WAF) to block requests with suspicious owner parameter values.

Valters IT
Securing Digital Frontiers