Multi-Stage Remediation Strategies

Multi-Stage Remediation Strategies

Complex vulnerabilities often require multi-stage remediation:

# multi-stage-remediation.py

class MultiStageRemediator:
    def __init__(self):
        self.stages = []
        
    def plan_remediation(self, vulnerability_report: Dict) -> Dict:
        """Plan multi-stage remediation approach"""
        
        remediation_plan = {
            'immediate': self.plan_immediate_fixes(vulnerability_report),
            'short_term': self.plan_short_term_fixes(vulnerability_report),
            'long_term': self.plan_long_term_fixes(vulnerability_report),
            'architectural': self.plan_architectural_changes(vulnerability_report)
        }
        
        return remediation_plan
    
    def plan_immediate_fixes(self, report: Dict) -> List[Dict]:
        """Quick fixes that can be applied immediately"""
        immediate_fixes = []
        
        # Critical vulnerabilities with available patches
        for vuln in report['vulnerabilities']:
            if vuln['severity'] == 'CRITICAL' and vuln.get('fixed_version'):
                immediate_fixes.append({
                    'action': 'patch',
                    'vulnerability': vuln['id'],
                    'method': 'version_update',
                    'timeline': 'within_24_hours',
                    'implementation': self.generate_patch_script(vuln)
                })
                
        # Disable vulnerable features
        for vuln in report['vulnerabilities']:
            if vuln.get('can_disable'):
                immediate_fixes.append({
                    'action': 'disable_feature',
                    'vulnerability': vuln['id'],
                    'method': 'configuration_change',
                    'timeline': 'immediate',
                    'implementation': self.generate_disable_script(vuln)
                })
                
        return immediate_fixes
    
    def plan_short_term_fixes(self, report: Dict) -> List[Dict]:
        """Fixes requiring testing and coordination"""
        short_term_fixes = []
        
        # Base image updates
        if report.get('base_image_outdated'):
            short_term_fixes.append({
                'action': 'update_base_image',
                'from': report['current_base_image'],
                'to': report['recommended_base_image'],
                'timeline': '1_week',
                'tasks': [
                    'test_compatibility',
                    'update_ci_pipelines',
                    'coordinate_deployment'
                ]
            })
            
        # Major dependency updates
        for dep in report.get('outdated_dependencies', []):
            if dep['update_type'] == 'major':
                short_term_fixes.append({
                    'action': 'major_dependency_update',
                    'dependency': dep['name'],
                    'from_version': dep['current'],
                    'to_version': dep['latest'],
                    'timeline': '2_weeks',
                    'tasks': [
                        'review_breaking_changes',
                        'update_code',
                        'comprehensive_testing'
                    ]
                })
                
        return short_term_fixes
    
    def plan_long_term_fixes(self, report: Dict) -> List[Dict]:
        """Strategic improvements requiring significant effort"""
        long_term_fixes = []
        
        # Move to minimal base images
        if report.get('base_image_size_mb', 0) > 100:
            long_term_fixes.append({
                'action': 'migrate_to_minimal_base',
                'current': report['current_base_image'],
                'options': ['alpine', 'distroless', 'scratch'],
                'timeline': '3_months',
                'benefits': [
                    'reduced_attack_surface',
                    'fewer_vulnerabilities',
                    'smaller_image_size'
                ]
            })
            
        # Implement vulnerability-free alternatives
        for vuln in report['vulnerabilities']:
            if vuln.get('no_fix_available'):
                alternative = self.find_alternative_solution(vuln)
                if alternative:
                    long_term_fixes.append({
                        'action': 'replace_vulnerable_component',
                        'component': vuln['package'],
                        'alternative': alternative,
                        'timeline': '6_months',
                        'effort': 'high'
                    })
                    
        return long_term_fixes