CVE-2013-3502

What it actually does

Remote authenticated command injection in monarch_scan.cgi allowing arbitrary OS command execution through unsanitized parameters passed via a JOSSO SSO cookie.

Why it matters to the business

Attackers can run commands on the monitoring server to steal sensitive data, disrupt operations, or gain further network access; the affected product is long unsupported with no official fixes available.

How an attack unfolds

An attacker first obtains a valid JOSSO SSO cookie through legitimate or stolen credentials, then submits a crafted HTTP request to monarch_scan.cgi containing command injection payloads in parameters that are executed directly by the server.

How to fix it

No fixed versions exist; immediately isolate or decommission the GroundWork Monitor instance, restrict network access to the MONARCH component, and migrate to a supported monitoring platform.

How to confirm the fix worked

Audit web server access logs for monarch_scan.cgi requests, confirm removal or hardening of the CGI script, and verify that no unauthenticated or unfiltered command execution paths remain.

Typical attack path

1. Acquire valid JOSSO SSO authentication cookie
2. Identify and target the monarch_scan.cgi endpoint
3. Inject OS commands via request parameters
4. Execute commands to exfiltrate data or establish persistence

How to detect it

Search web server logs and proxy records for requests to monarch_scan.cgi that contain shell metacharacters, unusual parameters, or command strings; correlate with JOSSO cookie usage patterns.

• monarch_scan.cgi
• JOSSO cookie in requests to MONARCH component
• shell metacharacters in CGI parameters

What your security team should do

• Block or tightly restrict external access to monarch_scan.cgi and the MONARCH component
• Hunt for historical indicators of command execution in logs dating back to publication
• Accelerate migration from the unsupported GroundWork product