CVE-2024-22050
📋 TL;DR
CVE-2024-22050 is a path traversal vulnerability in Iodine's static file service that allows unauthenticated remote attackers to read files outside the designated public folder by crafting malicious URLs. This affects all systems running Iodine versions below 0.7.33 that serve static files.
💻 Affected Systems
- Iodine web framework
📦 What is this software?
Iodine by Boazsegev
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive system files like /etc/passwd, configuration files, or source code, potentially leading to credential theft, privilege escalation, or further attacks.
Likely Case
Unauthorized access to application files, configuration data, or other sensitive information stored on the server outside the public directory.
If Mitigated
Limited impact if proper file permissions restrict access to sensitive files, but still exposes directory structure and accessible files.
🎯 Exploit Status
Path traversal vulnerabilities are commonly exploited and require minimal technical skill. No public exploit code is needed as the vulnerability is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.7.33
Vendor Advisory: https://github.com/boazsegev/iodine/security/advisories/GHSA-85rf-xh54-whp3
Restart Required: Yes
Instructions:
1. Update Iodine gem to version 0.7.33 or higher using 'gem update iodine'. 2. Restart the Iodine application server. 3. Verify the update with 'iodine --version'.
🔧 Temporary Workarounds
Disable static file serving
allRemove or disable Iodine's static file serving functionality if not required
Modify Iodine configuration to not serve static files
Use reverse proxy with path validation
allPlace Iodine behind a reverse proxy (nginx, Apache) that validates and sanitizes URL paths
Configure reverse proxy to filter malicious path traversal patterns
🧯 If You Can't Patch
- Implement strict file system permissions to limit what files Iodine process can access
- Deploy web application firewall (WAF) rules to block path traversal patterns in URLs
🔍 How to Verify
Check if Vulnerable:
Check Iodine version with 'iodine --version' or examine Gemfile.lock for iodine gem version below 0.7.33Check Version:
iodine --versionVerify Fix Applied:
Confirm version is 0.7.33 or higher and test with path traversal attempts that should be blocked📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../', '..\', or other path traversal patterns in URLs
- Unusual file access patterns from web requests
Network Indicators:
- HTTP requests with encoded path traversal sequences (%2e%2e%2f, etc.)
SIEM Query:
source="web_logs" AND (url="*../*" OR url="*..\\*" OR url="*%2e%2e%2f*")🔗 References
- https://github.com/advisories/GHSA-85rf-xh54-whp3
- https://github.com/boazsegev/iodine/commit/5558233fb7defda706b4f9c87c17759705949889
- https://github.com/boazsegev/iodine/security/advisories/GHSA-85rf-xh54-whp3
- https://vulncheck.com/advisories/vc-advisory-GHSA-85rf-xh54-whp3
- https://github.com/advisories/GHSA-85rf-xh54-whp3
- https://github.com/boazsegev/iodine/commit/5558233fb7defda706b4f9c87c17759705949889
- https://github.com/boazsegev/iodine/security/advisories/GHSA-85rf-xh54-whp3
- https://vulncheck.com/advisories/vc-advisory-GHSA-85rf-xh54-whp3
