Missing Authentication in Echo Go with Cockroachdb

When an Echo Go service interacts with Cockroachdb without enforcing authentication on its database connections or HTTP handlers, it exposes an unauthenticated attack surface that middleBrick classifies as Missing Authentication. This finding appears under the Authentication security check and indicates that endpoints or database operations can be triggered without verifying the identity of the caller.

In this specific stack, the risk arises when HTTP routes in Echo are not guarded by middleware that validates tokens, session cookies, or other credentials before issuing SQL queries to Cockroachdb. Even if Cockroachdb itself has strong internal authentication, the application layer bypasses verification, allowing an unauthenticated network caller to reach handlers that execute SQL directly. Because middleBrick scans the unauthenticated attack surface, it can detect endpoints that return sensitive data or accept write operations without prior authentication.

Consider an Echo route that constructs a SQL query using raw parameters without ensuring a user context exists:

// Echo Go handler without authentication check
func getUserHandler(c echo.Context) error {
    userID := c.Param("id")
    db, _ := sql.Open("cockroachdb", "postgresql://root@localhost:26257/mydb?sslmode=disable")
    var name string
    err := db.QueryRow("SELECT name FROM users WHERE id = $1", userID).Scan(&name)
    if err != nil {
        return c.JSON(http.StatusInternalServerError, map[string]string{"error": err.Error()})
    }
    return c.JSON(http.StatusOK, map[string]string{"name": name})
}

In this example, there is no check for an API key, JWT, or session before querying Cockroachdb. middleBrick’s Authentication check flags this because an attacker can call the endpoint with any user ID and retrieve records. The scanner does not assume authentication mechanisms; it tests whether responses differ when no credentials are supplied and maps findings to OWASP API Top 10 A01: Broken Object Level Authorization when combined with BOLA/IDOR checks.

Additionally, if the Cockroachdb connection string is exposed or default credentials are used, the unauthenticated path extends to the database layer. middleBrick’s scans include checks for common misconfigurations like allowing unauthenticated HTTP handlers to execute unrestricted SQL, which can lead to data exposure or privilege escalation when combined with other weaknesses.

To resolve Missing Authentication in Echo Go with Cockroachdb, enforce authentication before any database operation and validate input rigorously. Apply middleware that inspects credentials and ensures a verified identity is present before connecting to Cockroachdb.

1. Use JWT validation middleware in Echo to confirm the caller’s identity:

import (
    "github.com/labstack/echo/v4"
    "github.com/labstack/echo/v4/middleware"
)

func main() {
    e := echo.New()
    e.Use(middleware.JWTWithConfig(middleware.JWTConfig{
        SigningKey: []byte("your-secret-key"),
        Claims:     &CustomClaims{},
        SigningMethod: "HS256",
    }))
    e.GET("/users/:id", getUserHandler)
    e.Start(":8080")
}

2. In the handler, extract claims from the context and use them to scope queries to the authenticated user, preventing unauthorized data access:

func getUserHandler(c echo.Context) error {
    user := c.Get("user").(*middleware.JWTClaim)
    db, err := sql.Open("cockroachdb", "postgresql://root@localhost:26257/mydb?sslmode=disable")
    if err != nil {
        return c.JSON(http.StatusInternalServerError, map[string]string{"error": "db connect failed"})
    }
    defer db.Close()

    var name string
    // Use the authenticated user ID to enforce ownership
    err = db.QueryRow("SELECT name FROM users WHERE id = $1 AND user_uuid = $2", c.Param("id"), user.UserID).Scan(&name)
    if err != nil {
        return c.JSON(http.StatusForbidden, map[string]string{"error": "access denied"})
    }
    return c.JSON(http.StatusOK, map[string]string{"name": name})
}

3. For applications using API keys, validate the key before establishing a Cockroachdb session:

func apiKeyMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
    return func(c echo.Context) error {
        key := c.Request().Header.Get("X-API-Key")
        if !isValidAPIKey(key) {
            return c.JSON(http.StatusUnauthorized, map[string]string{"error": "invalid key"})
        }
        return next(c)
    }
}

func isValidAPIKey(key string) bool {
    // Compare against stored key securely; this is a simplified example
    return key == "trusted-key"
}

// Register the middleware
e.Use(apiKeyMiddleware)

4. Ensure Cockroachdb connections use strong authentication credentials stored securely (for example, via environment variables) and avoid default setups that allow unauthenticated access:

db, err := sql.Open("cockroachdb", "postgresql://myuser:mysecurepassword@localhost:26257/mydb?sslmode=require&auth=require

These steps align with remediation guidance provided by middleBrick findings, turning a Missing Authentication detection into a hardened configuration where every request to Cockroachdb is preceded by verified identity checks and least-privilege SQL execution.