shadow1ng/fscan · error

netbios_info_not_found

Error message

netbios_info_not_found

What it means

Guard in NetBIOSPlugin.Scan: the query completed but the returned NetBIOSInfo has Valid=false, meaning the response could not be parsed into usable names (empty or unparseable payload). The scan reports the lookup as unsuccessful rather than partial data.

Solutions

1. Verify the host actually runs NetBIOS services
2. Capture the raw UDP/TCP response to see why parsing marked it invalid
3. Retry: name-service responses are occasionally lost or truncated over UDP

When it happens

Trigger: Thrown at plugins/services/netbios.go:71 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of shadow1ng/fscan@95cc12e753 (2026-09-06). Data as JSON: /api/errors/a885ae1afac1602d. Report an issue: GitHub.

Appendix: source

Thrown at plugins/services/netbios.go:71

		netbiosInfo, err = p.queryNetBIOSNames(info.Host, config, state)
	} else {
		// TCP端口139 - NetBIOS会话服务
		netbiosInfo, err = p.queryNetBIOSSession(ctx, info.Host, session)
	}

	if err != nil {
		return &ScanResult{
			Success: false,
			Service: "netbios",
			Error:   err,
		}
	}

	if !netbiosInfo.Valid {
		return &ScanResult{
			Success: false,
			Service: "netbios",
			Error:   fmt.Errorf("%s", i18n.GetText("netbios_info_not_found")),
		}
	}

	// 记录NetBIOS发现信息
	msg := fmt.Sprintf("NetBios %s", target)
	if netbiosInfo.Summary() != "" {
		msg += fmt.Sprintf(" %s", netbiosInfo.Summary())
	}
	session.LogSuccess(msg)

	return &ScanResult{
		Success: true,
		Type:    plugins.ResultTypeService,
		Service: "netbios",
		Banner:  netbiosInfo.Summary(),
	}
}

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