CVE-2025-68271
CRITICAL
GHSA-w757-4qv9-mghp
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
3Description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.0 to 6.10.1, OpenC3 COSMOS contains a critical remote code execution vulnerability reachable through the JSON-RPC API. When a JSON-RPC request uses the string form of certain APIs, attacker-controlled parameter text is parsed into values using String#convert_to_value. For array-like inputs, convert_to_value executes eval(). Because the cmd code path parses the command string before calling authorize(), an unauthenticated attacker can trigger Ruby code execution even though the request ultimately fails authorization (401). This vulnerability is fixed in 6.10.2.
Analysis
OpenC3 COSMOS (space mission control software, 5.0.0-6.10.1) has unauthenticated RCE through the JSON-RPC API. String parameters are evaluated as Ruby code via convert_to_value. Maximum CVSS 10.0 with scope change.
Technical Context
The JSON-RPC API uses String#convert_to_value to parse string parameters, which evaluates them as Ruby code (CWE-95). An unauthenticated attacker can inject arbitrary Ruby expressions that execute on the COSMOS server.
Affected Products
OpenC3 COSMOS 5.0.0 through 6.10.1
Remediation
Update COSMOS immediately. Restrict JSON-RPC API access to authenticated, trusted users only.
Priority Score
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External POC / Exploit Code
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