Arp Spoofing in Actix with Oracle Db

Arp Spoofing is a Layer 2 network attack where an attacker sends falsified ARP messages to associate their MAC address with the IP address of a legitimate host, such as a database server. In an Actix web service that communicates with an Oracle Db, this can intercept or manipulate traffic between the application and the database. Actix is an asynchronous Rust web framework; if the runtime does not enforce strict network segregation or encrypted transport, an attacker on the same local network can position themselves between the Actix process and the Oracle listener.

The exposure is not introduced by Actix itself but by the deployment environment. When the Actix application resolves the Oracle Db hostname to an IP address, a falsified ARP reply can cause the application to send database credentials, query text, or result sets to the attacker. Because Oracle Db often uses long-lived connections and rich data types, intercepted queries or connection strings may reveal schema details, authentication information, or even session data. This combination therefore exposes confidentiality and integrity risks rather than serving as a vulnerability in Actix or the Oracle driver.

Attackers may leverage this to perform passive sniffing or active manipulation, such as modifying SQL traffic in-flight if integrity controls are absent. While the Oracle Net protocol includes integrity options, applications that do not explicitly require encryption may allow cleartext or weakly protected traffic on the wire. MiddleBrick scans detect such exposure by observing unauthenticated endpoints and identifying missing encryption or weak session management; findings are mapped to the Data Exposure and Input Validation checks, with remediation guidance focused on transport hardening.

Remediation centers on ensuring that all communication with Oracle Db uses encrypted connections and that the application does not rely on implicit trust of network-layer addressing. In Actix, this is achieved by configuring the Oracle client and the runtime to require secure channels and to validate server identity.

• Use encrypted connections with explicit wallet or certificate configuration. For example, using the oracle Rust crate, enforce secure link encryption by specifying a wallet location and setting SQLNET.ENCRYPTION_CLIENT to REQUIRED in the sqlnet.ora referenced by the wallet.

use oracle::Connection;

/// Establishes an encrypted connection to Oracle Db from an Actix runtime.
/// The wallet must be present on disk and SQLNET.ENCRYPTION_CLIENT=REQUIRED must be enforced.
/// 
/// Environment variables (set outside the app) should provide credentials:
/// - ORACLE_USER
/// - ORACLE_PASSWORD
/// - ORACLE_CONNECT_STRING (e.g., "//dbhost.example.com:1521/ORCLPDB1")
/// - TNS_ADMIN (points to the wallet directory containing sqlnet.ora and cwallet.sso)
#[actix_web::main]
async fn main() -> std::io::Result<()> {
    let user = std::env::var("ORACLE_USER").expect("ORACLE_USER must be set");
    let password = std::env::var("ORACLE_PASSWORD").expect("ORACLE_PASSWORD must be set");
    let connect_string = std::env::var("ORACLE_CONNECT_STRING").expect("ORACLE_CONNECT_STRING must be set");

    // The wallet is configured via TNS_ADMIN; the driver will use encryption if the wallet is valid.
    let conn = Connection::connect_with_params(
        &user,
        &password,
        &connect_string,
        oracle::ConnectParams::default(),
    ).expect("Failed to connect to Oracle Db with encryption");

    // Example query executed over the encrypted link.
    let rows = conn.query("SELECT id, name FROM secure_table WHERE status = :1", &[&"active"])
        .expect("Query failed");
    for row in rows {
        let id: i32 = row.get(0).unwrap_or(0);
        let name: String = row.get(1).unwrap_or_default();
        // Process row securely.
    }
    Ok(())
}

• Enforce network-level protections in Actix by binding to internal interfaces and avoiding exposure on public IPs where possible. Use middleware to reject requests with suspicious source addresses when behind a proxy that handles ARp at the edge.

use actix_web::{web, App, HttpServer, Responder};
use std::net::IpAddr;

/// Middleware-style guard to validate source IPs when the Actix service sits behind a reverse proxy.
/// This does not prevent ARp Spoofing on the LAN but reduces exposure surface.
async fn validate_source_address(req: actix_web::HttpRequest) -> bool {
    // In production, this list would be supplied via config and updated dynamically.
    let allowed_ips: Vec = vec!["10.0.0.1".parse().unwrap(), "10.0.0.2".parse().unwrap()];
    if let Some(peer) = req.peer_addr() {
        allowed_ips.contains(&peer.ip())
    } else {
        false
    }
}

async fn health_check() -> impl Responder {
    "OK"
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            .route("/health", web::get().to(health_check))
            // Additional routes should incorporate source validation where appropriate.
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}

• Use Oracle Db native security features such as Secure Configuration Guides, wallet-based auto-login, and SSL/TLS settings in sqlnet.ora to enforce encryption and integrity. Configure the service names used by the Actix application to require ciphersuites that resist passive decryption.

MiddleBrick can surface relevant findings under Data Exposure and Encryption checks, providing prioritized remediation guidance. For teams using the CLI, running middlebrick scan <url> against the Actix endpoint can identify missing encryption requirements; the Pro plan supports continuous monitoring so that regressions are flagged promptly.