CVE-2024-0241
📋 TL;DR
CVE-2024-0241 is an uncontrolled resource consumption vulnerability in encoded_id-rails gem versions before 1.0.0.beta2. Remote unauthenticated attackers can cause denial of service by sending HTTP requests with extremely long 'id' parameters. This affects all applications using vulnerable versions of the encoded_id-rails gem.
💻 Affected Systems
- encoded_id-rails gem
📦 What is this software?
Encodedid\ by Diaconou
Encodedid\ by Diaconou
Encodedid\ by Diaconou
⚠️ Risk & Real-World Impact
Worst Case
Complete application unavailability due to resource exhaustion, potentially affecting all users and requiring service restart.
Likely Case
Degraded performance or temporary service disruption for affected endpoints until malicious requests stop.
If Mitigated
Minimal impact with proper rate limiting, input validation, and resource monitoring in place.
🎯 Exploit Status
Simple HTTP request with long parameter makes exploitation trivial. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.0.beta2 and later
Vendor Advisory: https://github.com/stevegeek/encoded_id-rails/security/advisories/GHSA-3px7-jm2p-6h2c
Restart Required: Yes
Instructions:
1. Update Gemfile to 'gem "encoded_id-rails", ">= 1.0.0.beta2"' 2. Run 'bundle update encoded_id-rails' 3. Restart Rails application server
🔧 Temporary Workarounds
Input Length Validation
allAdd middleware or controller validation to limit 'id' parameter length
# In application_controller.rb or relevant controller:
before_action :validate_id_length
def validate_id_length
if params[:id] && params[:id].length > 1000
render plain: 'Invalid request', status: 400
end
end
Rate Limiting
allImplement rate limiting on affected endpoints to prevent DoS attacks
# Using rack-attack gem:
# In config/initializers/rack_attack.rb
Rack::Attack.throttle('requests by ip', limit: 100, period: 60) do |req|
req.ip if req.path.match?(/\/your_endpoint_path\//)
end
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block requests with extremely long 'id' parameters
- Deploy reverse proxy with request size limits and timeout configurations
🔍 How to Verify
Check if Vulnerable:
Check Gemfile.lock for encoded_id-rails version: grep -A1 -B1 'encoded_id-rails' Gemfile.lockCheck Version:
bundle show encoded_id-railsVerify Fix Applied:
Verify installed version: bundle show encoded_id-rails | grep -o '1\.0\.0\.beta[2-9]\|1\.[0-9]+\.[0-9]+'📡 Detection & Monitoring
Log Indicators:
- Multiple 400/500 errors from same IP with long parameter values
- Increased memory/CPU usage on application servers
- Request timeouts on endpoints using encoded_id
Network Indicators:
- HTTP requests with 'id' parameters exceeding 1000 characters
- High volume of requests to specific endpoints from single IP
SIEM Query:
source="rails_logs" AND (message="*id=*" AND message.length>1000) OR status=500🔗 References
- https://github.com/advisories/GHSA-3px7-jm2p-6h2c
- https://github.com/stevegeek/encoded_id-rails/commit/afa495a77b8a21ad582611f9cdc2081dc4018b91
- https://github.com/stevegeek/encoded_id-rails/security/advisories/GHSA-3px7-jm2p-6h2c
- https://vulncheck.com/advisories/vc-advisory-GHSA-3px7-jm2p-6h2c
- https://github.com/advisories/GHSA-3px7-jm2p-6h2c
- https://github.com/stevegeek/encoded_id-rails/commit/afa495a77b8a21ad582611f9cdc2081dc4018b91
- https://github.com/stevegeek/encoded_id-rails/security/advisories/GHSA-3px7-jm2p-6h2c
- https://vulncheck.com/advisories/vc-advisory-GHSA-3px7-jm2p-6h2c
