Insecure Design in Chi with Cockroachdb

Insecure design in a Chi application that uses CockroachDB often stems from treating the database as a trusted boundary and omitting authorization checks at the data-access layer. Chi is a minimalistic router for Go, and when endpoints are implemented without enforcing per-request context-based authorization, queries can execute with the privileges of the service account rather than the privileges of the requesting user.

Consider a handler that retrieves a user profile by an ID taken directly from the URL path without validating that the authenticated user owns that ID. If the handler uses a shared CockroachDB connection or session and builds SQL by simple string concatenation or even fmt-based queries, it becomes vulnerable to Insecure Design patterns such as Broken Object Level Authorization (BOLA/IDOR). An attacker can change the numeric ID in the request to access other users’ data, and because the design does not embed the requester’s identity into the query, the database returns records it should not.

CockroachDB’s SQL compatibility and distributed nature do not inherently protect against this class of flaw. Queries that rely on unchecked input parameters can be manipulated to perform operations outside the intended scope. For example, an insecure design might omit row-level security predicates or fail to bind the authenticated subject into the SQL statement. Even when using prepared statements, if the application logic does not enforce ownership checks, the database will execute the statement with the connection’s permissions, potentially exposing sensitive records.

Another dimension involves transaction boundaries and retry logic. CockroachDB recommends explicit transactions for multi-step operations, but an insecure design might start a transaction, perform a read without validating the caller’s rights, and then proceed to a write based on that read. If the transaction isolation level and retry handling are not carefully managed, the design can be coerced into race conditions or inconsistent states that amplify information exposure.

Compliance mappings such as OWASP API Top 10 (broken object-level authorization), PCI-DSS, and SOC2 highlight that insecure design is not a single bug but a systemic lack of context-aware authorization. middleBrick scans detect this by correlating unauthenticated or over-privileged query patterns with the absence of per-request subject binding, and it surfaces these as high-severity findings with remediation guidance specific to API security posture.

Remediation centers on embedding the authenticated subject into every database query and avoiding broad privileges for the service account. Use parameterized SQL with context-bound values, and enforce ownership checks before returning any row.

Example of an insecure handler in Chi that should be avoided:

// Insecure: ID from URL used directly without ownership check
func (r appRouter) getUserProfile(w http.ResponseWriter, req *http.Request) {
    idStr := chi.URLParam(req, "id")
    var profile UserProfile
    err := r.db.QueryRow("SELECT id, user_id, display_name FROM profiles WHERE id = $1", idStr).Scan(&profile.ID, &profile.UserID, &profile.DisplayName)
    if err != nil {
        http.Error(w, "not found", http.StatusNotFound)
        return
    }
    json.NewEncoder(w).Encode(profile)
}

Secure remediation in Chi using context-aware queries and explicit binding of the authenticated user ID:

// Secure: bind subject and enforce ownership at the database layer
func (r appRouter) getUserProfile(w http.ResponseWriter, req *http.Request) {
    userID, ok := req.Context().Value(userKey("user_id")).(string)
    if !ok {
        http.Error(w, "unauthorized", http.StatusUnauthorized)
        return
    }
    idStr := chi.URLParam(req, "id")
    var profile UserProfile
    // Use a parameterized query with the user_id bound alongside the resource ID
    err := r.db.QueryRow(req.Context(),
        "SELECT id, user_id, display_name FROM profiles WHERE id = $1 AND user_id = $2",
        idStr, userID).Scan(&profile.ID, &profile.UserID, &profile.DisplayName)
    if err != nil {
        if errors.Is(err, sql.ErrNoRows) {
            http.Error(w, "not found or access denied", http.StatusNotFound)
            return
        }
        http.Error(w, "server error", http.StatusInternalServerError)
        return
    }
    json.NewEncoder(w).Encode(profile)
}

When using transactions, embed the subject into each statement and avoid relying on session-level privileges:

// Secure transaction with subject binding
func (r appRouter) updateProfile(w http.ResponseWriter, req *http.Request) {
    userID, ok := req.Context().Value(userKey("user_id")).(string)
    if !ok {
        http.Error(w, "unauthorized", http.StatusUnauthorized)
        return
    }
    tx, err := r.db.Begin(req.Context())
    if err != nil {
        http.Error(w, "server error", http.StatusInternalServerError)
        return
    }
    defer tx.Rollback()

    idStr := chi.URLParam(req, "id")
    var currentOwner string
    err = tx.QueryRow(req.Context(),
        "SELECT user_id FROM profiles WHERE id = $1", idStr).Scan(&currentOwner)
    if err != nil {
        http.Error(w, "not found", http.StatusNotFound)
        return
    }
    if currentOwner != userID {
        http.Error(w, "forbidden", http.StatusForbidden)
        return
    }

    _, err = tx.Exec(req.Context(),
        "UPDATE profiles SET display_name = $1 WHERE id = $2 AND user_id = $3",
        req.FormValue("display_name"), idStr, userID)
    if err != nil {
        http.Error(w, "update failed", http.StatusInternalServerError)
        return
    }
    if err := tx.Commit(); err != nil {
        http.Error(w, "commit failed", http.StatusInternalServerError)
        return
    }
    w.WriteHeader(http.StatusOK)
}

These patterns align with OWASP API Top 10 insecure design guidance and help ensure that CockroachDB executes queries with the least privilege necessary. middleBrick can surface missing subject bindings and over-privileged query structures as high-severity findings, enabling teams to address insecure design before deployment.

Can middleBrick detect insecure design issues in Chi applications using CockroachDB?

Yes. middleBrick performs unauthenticated scans that correlate missing subject bindings in SQL queries with per-endpoint authorization gaps, surfacing BOLA/IDOR and insecure design findings with severity and remediation guidance.

Does using prepared statements alone protect against insecure design in Chi with CockroachDB?

Prepared statements prevent injection but do not enforce authorization. If the application does not bind the authenticated user into each query, insecure design can still lead to IDOR and over-privileged access, which middleBrick flags through its security checks.