T09 · Insecure Skill Coding Practices
- Location
snippets/common-configs.md:37- Finding
Gateway Configuration Binds to All Network Interfaces by Default
- Content
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Vulnerability Details
File Location:
snippets/common-configs.md, lines 37–44
Vulnerability Type: Insecure network exposure
Risk Level: Mediumjson ## Gateway Configuration { "gateway": { "host": "0.0.0.0", "port": 8080 } }Technical Analysis
The ready-to-use configuration binds the gateway to
0.0.0.0, causing it to listen on every available IPv4 network interface. The example does not include or accompany authentication, TLS, network allowlisting, reverse-proxy protection, or firewall requirements.Because the project presents this as a reusable configuration snippet, users may copy it without realizing that the gateway can become reachable beyond the local host. Actual exploitability depends on the deployment's routing, firewall, gateway functionality, and any security controls implemented elsewhere.
Attack Path
- A user copies the documented gateway configuration.
- The gateway starts on port
8080and listens on all IPv4 interfaces. - A local-network, container-network, or internet-based attacker reaches the exposed port where routing and firewall rules permit it.
- The attacker probes or accesses gateway endpoints.
- If the gateway lacks effective authentication or endpoint-level authorization, the attacker may invoke exposed functionality or access gateway data.
Impact Assessment
The immediate impact is unintended expansion of the gateway's network attack surface. A reachable attacker may enumerate endpoints, exploit gateway vulnerabilities, or access functions that were intended to remain local.
The precise privileges obtainable cannot be established from this repository because it does not contain the gateway implementation or its authentication controls. The potential scope is limited by the gateway process's permissions, exposed functionality, and surrounding network controls.
- Remediation
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Remediation Suggestions
-
Change the safe default to the loopback interface:
json { "gateway": { "host": "127.0.0.1", "port": 8080 } } -
Describe binding to
0.0.0.0as an explicit remote-access option rather than the default. -
Require strong authentication and endpoint-level authorization before enabling remote access.
-
Protect remote connections with TLS, either directly or through a securely configured reverse proxy.
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Restrict inbound traffic with host and network firewalls, security groups, or IP allowlists.
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Warn users not to expose port
8080directly to the public internet. -
Apply least privilege to the gateway process and document a verification step, such as checking listening interfaces and testing access from an unauthorized host.
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