CVE-2025-69230
📋 TL;DR
This vulnerability in AIOHTTP allows attackers to trigger excessive warning-level logging by sending specially crafted Cookie headers. This affects applications using AIOHTTP versions 3.13.2 and below that access the cookies attribute. The logging storm can degrade application performance and fill up disk space.
💻 Affected Systems
- aiohttp
📦 What is this software?
Aiohttp by Aiohttp
⚠️ Risk & Real-World Impact
Worst Case
Denial of service through disk space exhaustion and application performance degradation, potentially causing service disruption.
Likely Case
Increased log volume causing performance issues and potential disk space consumption, requiring log cleanup and monitoring.
If Mitigated
Minimal impact with proper log rotation and monitoring in place, though some performance degradation may still occur.
🎯 Exploit Status
Exploitation requires sending HTTP requests with malformed Cookie headers. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.13.3
Vendor Advisory: https://github.com/aio-libs/aiohttp/security/advisories/GHSA-fh55-r93g-j68g
Restart Required: Yes
Instructions:
1. Update aiohttp package using pip: pip install --upgrade aiohttp==3.13.3
2. Restart your application to load the updated library
3. Verify the version is now 3.13.3 or higher
🔧 Temporary Workarounds
Disable cookie logging
allConfigure logging to suppress warning messages from aiohttp cookie parsing
import logging
logging.getLogger('aiohttp').setLevel(logging.ERROR)
Implement rate limiting
allAdd rate limiting to HTTP endpoints to prevent excessive requests
🧯 If You Can't Patch
- Implement aggressive log rotation and monitoring to prevent disk space exhaustion
- Deploy WAF or reverse proxy with request filtering to block malformed Cookie headers
🔍 How to Verify
Check if Vulnerable:
Check aiohttp version: python -c "import aiohttp; print(aiohttp.__version__)" and verify if it's 3.13.2 or belowCheck Version:
python -c "import aiohttp; print(aiohttp.__version__)"Verify Fix Applied:
After patching, verify version is 3.13.3 or higher and test with malformed Cookie headers to ensure no excessive logging occurs📡 Detection & Monitoring
Log Indicators:
- Sudden increase in aiohttp warning logs about invalid cookies
- High volume of 'Invalid cookie' warning messages
Network Indicators:
- Multiple HTTP requests with malformed Cookie headers from single sources
- Unusual patterns in Cookie header values
SIEM Query:
source="application.logs" AND "Invalid cookie" AND "aiohttp" | stats count by src_ip