CERTIFICATE_ERROR_EVENT_JS_CHECK

CERTIFICATE_ERROR_EVENT_JS_CHECK - Insecure TLS Validation

When using HTTP as the transport, security is provided by Transport Layer Security (TLS). TLS, and its predecessor SSL, are widely used on the Internet to authenticate a service to a client, and then to provide confidentiality to the channel. This check looks for a common mistake that lead to insecure TLS validation which happens when the app voluntary opts-out of TLS certificates validation.

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Risk

TLS validation opt-out should not be used, as it makes possible to sniff and tamper the user’s traffic. If nodeIntegration is also enabled, an attacker can inject malicious JavaScript and compromise the user’s host.

Auditing

Verify that the application does not explicitly opt-out from TLS validation.

Look for occurrences of certificate-error:

app.on('certificate-error', (event, webContents, url, error, certificate, callback) => { //error in cert
    if (url === 'https://doyensec.com') {
        callback(true) //its okay, go ahead anyway
    } else {
        callback(false)
    }
})

References

• https://en.wikipedia.org/wiki/HTTPS
• https://letsencrypt.org/how-it-works/