T09 · Insecure Skill Coding Practices
- Location
snippets/common-configs.md:37- Finding
Gateway Configuration Exposes the Service on All Network Interfaces
- Content
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Vulnerability Details
File Location:
snippets/common-configs.md, lines 37–45
Vulnerability Type: Insecure network exposure
Risk Level: MediumVulnerable Code
json { "gateway": { "host": "0.0.0.0", "port": 8080 } }Technical Analysis
The project presents this snippet as a ready-to-use gateway configuration. Setting the host to
0.0.0.0causes the gateway to listen on every available network interface rather than restricting access to the local machine.The example does not include authentication, TLS, firewall restrictions, or a warning that remote exposure must be intentional. A user who copies the snippet may therefore expose the gateway to a local network, container network, cloud network, or the public Internet, depending on the surrounding infrastructure.
The vulnerability is a failure of secure-by-default configuration and least network exposure. Whether exploitation succeeds ultimately depends on external controls and protections implemented by the gateway itself.
Attack Path
- A user copies the documented gateway configuration.
- The gateway binds to all interfaces on TCP port 8080.
- Network routing, container port publication, or permissive firewall rules make the port reachable by an untrusted party.
- The attacker scans for or otherwise discovers the exposed service.
- The attacker connects to gateway endpoints.
- If those endpoints lack independent authentication and authorization, the attacker accesses exposed gateway functionality or data.
Impact Assessment
The immediate impact is an expanded network attack surface. An attacker may gain remote access to any gateway endpoints that are reachable and insufficiently protected. The exact privileges obtainable cannot be established from this repository because the gateway implementation and its authentication controls are not included.
Potential scope includes ...[truncated 260 chars]
- Remediation
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Remediation Suggestions
-
Change the default binding to localhost:
json { "gateway": { "host": "127.0.0.1", "port": 8080 } } -
Clearly state that
0.0.0.0must only be used when remote access is explicitly required. -
Require strong authentication and authorization before permitting non-local access.
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Restrict inbound traffic with host, cloud, or container firewall rules and allow only trusted source networks.
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Use TLS for non-local connections, preferably through a securely configured reverse proxy.
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Document container port-publication and cloud security-group implications.
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Provide separate local-only and hardened remote-access examples so users do not unintentionally choose an exposed default.
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