REMEDIATION_SUMMARY

SQL Injection Remediation Summary

Quick Reference for nself Security Fix

Status: 🔴 IN PROGRESS (0% Complete) Priority: CRITICAL Total Vulnerabilities: ~150 Estimated Effort: 60-80 hours

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📊 Current Status

Phase	Files	Vulnerabilities	Status	Due Date
Phase 1	2 files	60 critical	🔴 Not Started	Week 1
Phase 2	3 files	90 remaining	🔴 Not Started	Week 2
Phase 3	Testing	N/A	🔴 Not Started	Week 3

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🎯 Quick Start

1. Read the Documentation

• ✅ Start here: SQL_INJECTION_REMEDIATION_REPORT.md
• ✅ Fix guide: SQL_INJECTION_FIX_GUIDE.md
• ✅ This summary: Quick reference

2. Set Up Your Environment

# Source validation functions
source src/lib/utils/validation.sh

# Source safe query functions
source src/lib/database/safe-query.sh

# Run existing tests
bash src/tests/security/test-sql-injection.sh

3. Start Fixing (Phase 1)

# File 1: billing/usage.sh (60 vulnerabilities)
# File 2: billing/reports.sh (30 vulnerabilities)

# For each function:
# 1. Add input validation
# 2. Replace ${var} with :'param'
# 3. Add parameters to billing_db_query call
# 4. Test manually
# 5. Commit

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🚨 Most Critical Vulnerabilities

Top 3 - FIX FIRST

1. Usage Aggregate Functions (billing/usage.sh)

• Lines: 305-312, 350-357, 839-924
• Impact: Financial data exposure
• Difficulty: Medium
• Time: 4 hours

2. Tenant Provisioning (tenant/lifecycle.sh)

• Lines: 34-79
• Impact: Account takeover, privilege escalation
• Difficulty: Hard
• Time: 3 hours

3. Usage Export (billing/usage.sh)

• Lines: 1195-1310
• Impact: Complete data exfiltration
• Difficulty: Hard (dynamic WHERE clauses)
• Time: 3 hours

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📋 Fix Pattern Cheat Sheet

Simple SELECT

# Validate
validate_uuid "$id" || return 1

# Parameterize
billing_db_query "SELECT * FROM table WHERE id = :'id'" "tuples" "id" "$id"

Multiple Parameters

# Validate all
validate_uuid "$customer_id" || return 1
validate_service_name "$service" || return 1

# Parameterize all
billing_db_query "
  SELECT * FROM table
  WHERE customer_id = :'customer_id'
  AND service = :'service'
" "tuples" "customer_id" "$customer_id" "service" "$service"

Optional Parameters

# Use COALESCE or conditional SQL
billing_db_query "
  SELECT * FROM table
  WHERE customer_id = :'customer_id'
  AND (:'service' = '' OR service = :'service')
  AND (:'start_date' = '' OR date >= :'start_date'::timestamp)
" "tuples" \
  "customer_id" "$customer_id" \
  "service" "${service:-}" \
  "start_date" "${start_date:-}"

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🔍 Search & Replace Patterns

Find Vulnerable Code

# Search for string interpolation in SQL
grep -rn "WHERE.*'\${" src/lib/billing/
grep -rn "WHERE.*'\${" src/lib/tenant/

# Search for unparameterized psql calls
grep -rn "psql.*-c.*\"\$" src/lib/tenant/

# Search for unsafe billing_db_query calls
grep -rn "billing_db_query.*'\${" src/lib/billing/

Common Replacements

# Pattern 1: Single WHERE clause
FROM: WHERE id = '${id}'
TO:   WHERE id = :'id'
ADD:  "id" "$id" to billing_db_query parameters

# Pattern 2: Multiple WHERE clauses
FROM: WHERE a = '${a}' AND b = '${b}'
TO:   WHERE a = :'a' AND b = :'b'
ADD:  "a" "$a" "b" "$b" to parameters

# Pattern 3: Dynamic WHERE
FROM: where_clause="customer_id = '${customer_id}'"
TO:   (Delete variable, use SQL conditional instead)
      WHERE customer_id = :'customer_id'
      AND (:'optional' = '' OR field = :'optional')

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📝 Testing Checklist

For each fixed function:

# 1. Validation test
result=$(function_name "'; DROP TABLE users; --" 2>&1)
# Should: Error "Invalid format"

# 2. Normal operation test
result=$(function_name "valid-value")
# Should: Work correctly

# 3. Special characters test
result=$(function_name "test@example.com")
# Should: Work correctly (chars treated as literals)

# 4. Edge case test
result=$(function_name "")
# Should: Error "Invalid format"

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📊 Progress Tracking

Files Fixed (0/5)

• src/lib/billing/usage.sh (0/60 vulnerabilities)
• src/lib/billing/reports.sh (0/30 vulnerabilities)
• src/lib/tenant/lifecycle.sh (0/25 vulnerabilities)
• src/lib/tenant/core.sh (0/20 vulnerabilities)
• src/lib/tenant/routing.sh (0/15 vulnerabilities)

Functions Fixed by Category

Billing - Usage (0/13)

• usage_get_all_table()
• usage_get_service_table()
• usage_get_all_json()
• usage_get_all_csv()
• usage_get_service_json()
• usage_get_service_csv()
• usage_aggregate_hourly()
• usage_aggregate_daily()
• usage_aggregate_monthly()
• usage_check_service_alert()
• usage_export_csv()
• usage_export_json()
• usage_get_peaks()

Billing - Reports (0/5)

• report_usage_trends_table()
• report_usage_trends_csv()
• report_usage_trends_json()
• report_churn_table()
• report_aging_table()

Tenant - Lifecycle (0/10)

• tenant_provision()
• create_tenant_owner()
• initialize_tenant_settings()
• tenant_lifecycle_suspend()
• tenant_lifecycle_activate()
• tenant_soft_delete()
• tenant_permanent_delete()
• tenant_migrate_plan()
• tenant_create_backup()
• tenant_health_check()

Tenant - Core (0/7)

• tenant_list()
• tenant_show()
• tenant_suspend()
• tenant_activate()
• tenant_member_remove()
• tenant_member_list()
• tenant_domain_add()

Tenant - Routing (0/2)

• generate_custom_domain_ssl()
• get_tenant_url()

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🚀 Daily Goals

Day 1 (8 hours)

• Fix usage_get_all_table() - 1 hour
• Fix usage_get_service_table() - 1 hour
• Fix usage_aggregate_hourly() - 1.5 hours
• Fix usage_aggregate_daily() - 1.5 hours
• Fix usage_aggregate_monthly() - 1.5 hours
• Test all fixes - 1.5 hours

Target: 5 functions, ~15 vulnerabilities fixed

Day 2 (8 hours)

• Fix usage_export_csv() - 2 hours
• Fix usage_export_json() - 1.5 hours
• Fix usage_get_peaks() - 1 hour
• Fix usage_check_service_alert() - 1.5 hours
• Test all fixes - 2 hours

Target: 4 functions, ~20 vulnerabilities fixed

Day 3 (8 hours)

• Fix tenant_provision() - 3 hours
• Fix tenant_lifecycle_suspend() - 1 hour
• Fix tenant_lifecycle_activate() - 1 hour
• Fix tenant_soft_delete() - 1 hour
• Test all fixes - 2 hours

Target: 4 functions, ~20 vulnerabilities fixed

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🎓 Learning Resources

Internal Documentation

• Validation functions: src/lib/utils/validation.sh
• Safe query functions: src/lib/database/safe-query.sh
• Working examples: src/lib/billing/quotas.sh (already fixed)
• Test framework: src/tests/security/test-sql-injection.sh

External Resources

• OWASP SQL Injection: https://owasp.org/www-community/attacks/SQL_Injection
• PostgreSQL Prepared Statements: https://www.postgresql.org/docs/current/sql-prepare.html
• Input Validation Guide: https://cheatsheetseries.owasp.org/cheatsheets/Input_Validation_Cheat_Sheet.html

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🔧 Tools & Commands

Search for Vulnerabilities

# Find all string interpolation in SQL
rg "'\\\${" src/lib/billing/ src/lib/tenant/

# Find all unvalidated psql calls
rg "psql.*-c.*'\\\$" src/lib/

# Find all billing_db_query without parameters
rg "billing_db_query.*'\\\${" src/lib/billing/

Test Your Fixes

# Run all security tests
bash src/tests/security/test-sql-injection.sh

# Run specific function test
bash src/tests/security/test-usage-functions.sh usage_get_all_table

# Manual injection test
result=$(usage_get_all_table "'; DROP TABLE billing_usage_records; --" 2>&1)
echo "$result" | grep -q "Invalid" && echo "PASS" || echo "FAIL"

Commit Guidelines

# Good commit message format
git commit -m "security: fix SQL injection in usage_get_all_table()

- Add customer_id validation
- Parameterize all WHERE clause variables
- Replace string interpolation with :param syntax
- Add test for injection attempt

Fixes: #XXX (SQL Injection in billing module)
"

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⚠️ Common Mistakes to Avoid

1. ❌ Forgetting Validation

   # WRONG
   billing_db_query "WHERE id = :'id'" "tuples" "id" "$user_input"
   
   # RIGHT
   validate_uuid "$user_input" || return 1
   billing_db_query "WHERE id = :'id'" "tuples" "id" "$user_input"

2. ❌ Partial Parameterization

   # WRONG - service is still vulnerable
   billing_db_query "WHERE id = :'id' AND service = '${service}'" "tuples" "id" "$id"
   
   # RIGHT
   billing_db_query "WHERE id = :'id' AND service = :'service'" "tuples" "id" "$id" "service" "$service"

3. ❌ Building SQL Fragments

   # WRONG
   filter="AND status = '${status}'"
   billing_db_query "SELECT * FROM table WHERE id = :'id' ${filter}" "tuples" "id" "$id"
   
   # RIGHT
   billing_db_query "
     SELECT * FROM table
     WHERE id = :'id'
     AND (:'status' = '' OR status = :'status')
   " "tuples" "id" "$id" "status" "${status:-}"

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📞 Getting Help

If stuck on a particularly complex vulnerability:

1. Review the fix guide for similar patterns
2. Check src/lib/billing/quotas.sh for working examples
3. Search for existing safe implementations in codebase
4. Ask for code review before committing

Remember: Better to ask for help than to commit an incorrect fix!

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🎯 Success Criteria

Before considering remediation complete:

• All 150 vulnerabilities fixed and tested
• All validation functions in place
• All queries use parameterized syntax
• No string interpolation in SQL strings
• All tests passing (including new security tests)
• Code review completed
• Documentation updated
• CI/CD includes SQL injection tests
• Production deployment blocked until complete

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Next Steps: Start with Day 1 goals, fix first 5 functions, get code review.

Estimated Completion: 3 weeks (15 working days at 8 hours/day)

Last Updated: 2026-01-31 Progress: 0% (0/150 vulnerabilities fixed)