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Testing TimThumb Version Detection Through Bad Requests in WPScan

This test suite validates the TimThumb version detection functionality in WPScan through bad request handling. It focuses on the aggressive detection method that examines version information from server responses.

Test Coverage Overview

The test suite provides comprehensive coverage for TimThumb version detection through bad request responses. It tests two critical scenarios:

Handling cases where no version information is present
Successfully extracting version numbers when available in responses
Validating version object creation with confidence levels

Implementation Analysis

The testing approach utilizes RSpec’s describe/context pattern for structured test organization. It implements HTTP request stubbing to simulate server responses and validates version extraction logic through aggressive detection methods.

The tests leverage RSpec’s before/after hooks and shared examples for efficient test setup and execution.

Technical Details

Key technical components include:

RSpec testing framework
Web request stubbing with fixtures
Version model validation
Confidence level assertions
File-based test fixtures

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Isolated test scenarios using context blocks
Clear test case organization
Proper fixture management
Consistent setup and teardown patterns
Explicit expectations and assertions

wpscanteam/wpscan

spec/app/finders/timthumb_version/bad_request_spec.rb

            
# frozen_string_literal: true

describe WPScan::Finders::TimthumbVersion::BadRequest do
  subject(:finder) { described_class.new(target) }
  let(:target)     { WPScan::Model::Timthumb.new(url) }
  let(:url)        { 'http://ex.lo/timthumb.php' }
  let(:fixtures)   { FINDERS_FIXTURES.join('timthumb_version', 'bad_request') }

  describe '#aggressive' do
    before { stub_request(:get, url).to_return(body: File.read(fixtures.join(file))) }
    after  { expect(finder.aggressive).to eql @expected }

    context 'when no version' do
      let(:file) { 'no_version.php' }

      it 'returns nil' do
        @expected = nil
      end
    end

    context 'when a version' do
      let(:file) { '2.8.14.php' }

      it 'returns the expected version' do
        @expected = WPScan::Model::Version.new(
          '2.8.14',
          confidence: 90,
          found_by: 'Bad Request (Aggressive Detection)',
          interesting_entries: [
            "#{url}, TimThumb version : 2.8.14"
          ]
        )
      end
    end
  end
end