Cross Site Request Forgery in Echo Go with Cockroachdb

Cross Site Request Forgery (CSRF) in an Echo Go service that uses CockroachDB can occur when state-changing endpoints rely solely on cookies for session identity without anti-CSRF tokens. Because CockroachDB is often used to store user sessions or authorization records, an attacker can craft a malicious web page that issues requests to your Echo Go handlers. If the application uses cookie-based authentication (for example, a session ID in a cookie) and does not validate the Origin/Referer header or require a per-request CSRF token, the browser will automatically include credentials when the victim visits the attacker’s page. CockroachDB does not prevent these requests; it simply persists the data your app trusts. A typical pattern is an Echo Go route like /transfer that reads a user ID from a session cookie and writes a row to a CockroachDB table. Without CSRF protections, a forged form or image tag pointing to that route can cause unauthorized transfers or updates, and the database will faithfully record the attacker’s intended changes.

Consider an Echo Go handler that updates a user’s email stored in a CockroachDB table. If the handler trusts a cookie named session_id and does not enforce a CSRF token, an attacker can host a page with a form like <form action="https://api.example.com/email" method="POST"><input name="email" value="[email protected]"></form>. When a logged-in victim visits that page, the browser sends the session cookie, and CockroachDB receives the request as valid. Because the database only sees the query and the application’s trust in the cookie, there is no inherent way for CockroachDB to distinguish legitimate from malicious origins. The risk is especially relevant when combined with other findings such as missing input validation or insufficient authentication checks, which middleBrick scans for across its 12 security checks, including Authentication and BOLA/IDOR.

In practice, you should treat CockroachDB as a secure data store, not a security boundary for request origin verification. MiddleBrick’s unauthenticated scan can detect missing CSRF protections in your OpenAPI/Swagger definitions and runtime behavior, including checks tied to OWASP API Top 10 and compliance mappings. By correlating spec definitions with runtime findings, it highlights where authentication is present but CSRF-specific controls are absent. This helps you focus remediation on endpoints that mutate data in CockroachDB, ensuring your Echo Go routes validate anti-CSRF mechanisms rather than relying on implicit browser behavior.

To remediate CSRF in Echo Go when using CockroachDB, implement anti-CSRF tokens and enforce strict origin checks. Use a cryptographically secure token per session, store it server-side in CockroachDB alongside the session, and require it on state-changing methods. Below is a concise example that shows session creation, token storage in CockroachDB, and validation in an Echo Go handler.

// Session model stored in CockroachDB
type Session struct {
    ID        uuid.UUID `db:id`
    UserID    uuid.UUID `db:user_id`
    CSRFToken string    `db:csrf_token`
    ExpiresAt time.Time `db:expires_at`
}

// Generate and store a session with a CSRF token
func createSession(db *pgxpool.Pool, userID uuid.UUID) (Session, error) {
    csrfToken := generateSecureToken()
    session := Session{
        ID:        uuid.New(),
        UserID:    userID,
        CSRFToken: csrfToken,
        ExpiresAt: time.Now().Add(24 * time.Hour),
    }
    _, err := db.Exec(context.Background(),
        `INSERT INTO sessions (id, user_id, csrf_token, expires_at) VALUES ($1, $2, $3, $4)`,
        session.ID, session.UserID, session.CSRFToken, session.ExpiresAt)
    return session, err
}

// Validate CSRF token in an Echo Go handler
func transferEmail(c echo.Context) error {
    sessionID, err := uuid.Parse(c.Request().Header.Get("X-Session-ID"))
    if err != nil {
        return c.JSON(http.StatusUnauthorized, map[string]string{"error": "invalid_session"})
    }
    var session Session
    err = db.Get(context.Background(), &session, `SELECT id, csrf_token FROM sessions WHERE id = $1 AND expires_at > $2`, sessionID, time.Now())
    if err != nil {
        return c.JSON(http.StatusUnauthorized, map[string]string{"error": "session_not_found"})
    }
    provided := c.FormValue("csrf_token")
    if subtle.ConstantTimeCompare([]byte(provided), []byte(session.CSRFToken)) != 1 {
        return c.JSON(http.StatusForbidden, map[string]string{"error": "csrf_token_invalid"})
    }
    newEmail := c.FormValue("email")
    _, err = db.Exec(context.Background(),
        `UPDATE users SET email = $1 WHERE id = (SELECT user_id FROM sessions WHERE id = $2)`,
        newEmail, sessionID)
    if err != nil {
        return c.JSON(http.StatusInternalServerError, map[string]string{"error": "db_error"})
    }
    return c.JSON(http.StatusOK, map[string]string{"status": "updated"})
}

func generateSecureToken() string {
    buf := make([]byte, 32)
    if _, err := rand.Read(buf); err != nil {
        panic(err)
    }
    return hex.EncodeToString(buf)
}

In your Echo Go routes, ensure you set X-Session-ID as a non-cookie header (or use double-submit cookie patterns carefully) and require the CSRF token in the request body for mutating endpoints. Combine this with strict CORS and Origin/Referer checks to reduce risk. MiddleBrick’s GitHub Action can be added to CI/CD pipelines to automatically verify that your OpenAPI spec and runtime findings include CSRF-related controls, failing builds if risk thresholds are exceeded.