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Fix Insufficient Logging & Monitoring in Camping

In the wild, silence is your enemy. If your Camping app doesn't scream when it's being probed, you're already compromised. Insufficient logging and monitoring (A09:2021) means you have zero visibility into brute-force attempts, unauthorized access, or logic abuse. We need to hook into the Rack stack and application logic to ensure every security-critical event leaves a trace for your SIEM to ingest.

The Vulnerable Pattern

module CampingApp
  module Controllers
    class Login < R '/login'
      def post
        user = User.find_by_username(input.username)
        if user && user.password == input.password
          state.user_id = user.id
          redirect Index
        else
          # Silent failure: Attacker can brute-force without any trace in logs
          @error = "Invalid credentials"
          render :login
        end
      end
    end

class AdminPanel < R '/admin'
  def get
    unless state.user_id && User.find(state.user_id).admin?
      # Unauthorized access attempt is ignored by the logger
      redirect Index
    end
    render :admin
  end
end


end
end

The Secure Implementation

To fix this, we implement a tiered logging strategy. First, we inject Rack::CommonLogger into the middleware stack to capture basic HTTP telemetry (status codes, paths, IPs). Second, we manually instrument security-critical code paths—specifically authentication and authorization checks—using a dedicated Logger instance. We ensure the log format includes timestamps, source IPs, and the targeted resource. Finally, these logs should be forwarded to a centralized monitoring system with configured alerts for 'AUTH_FAILURE' spikes, which indicate active credential stuffing or brute-force attacks.

require 'logger'
$log = Logger.new('security.log')

module CampingApp
module Controllers
class Login < R ‘/login’
def post
user = User.find_by_username(input.username)
if user && user.password == input.password
$log.info(“AUTH_SUCCESS: user=#{input.username} ip=#{env[‘REMOTE_ADDR’]}”)
state.user_id = user.id
redirect Index
else
$log.warn(“AUTH_FAILURE: user=#{input.username} ip=#{env[‘REMOTE_ADDR’]}”)
@error = “Invalid credentials”
render :login
end
end
end


class AdminPanel < R '/admin'
  def get
    user = User.find(state.user_id) if state.user_id
    unless user && user.admin?
      $log.fatal("UNAUTHORIZED_ACCESS_ATTEMPT: user_id=#{state.user_id || 'guest'} path=/admin ip=#{env['REMOTE_ADDR']}")
      redirect Index
    end
    render :admin
  end
end


end
end


In your config.ru or startup script:


use Rack::CommonLogger, $log
System Alert • ID: 9030
Target: Camping API
Potential Vulnerability

Your Camping API might be exposed to Insufficient Logging & Monitoring

74% of Camping apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.

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