CVE-2025-59350
📋 TL;DR
Dragonfly's proxy access control mechanism prior to version 2.1.0 uses simple string comparisons vulnerable to timing attacks. Attackers can guess passwords character-by-character by measuring execution time differences. This affects all Dragonfly deployments using proxy authentication with vulnerable versions.
💻 Affected Systems
- Dragonfly
📦 What is this software?
Dragonfly by Linuxfoundation
⚠️ Risk & Real-World Impact
Worst Case
Complete authentication bypass allowing unauthorized access to Dragonfly proxy services, potentially leading to data exfiltration or service disruption.
Likely Case
Credential compromise through password guessing attacks, enabling unauthorized access to proxy resources.
If Mitigated
Limited impact with strong passwords and network segmentation, though timing attacks remain theoretically possible.
🎯 Exploit Status
Requires authentication attempts and precise timing measurements; more difficult in high-latency environments.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.0
Vendor Advisory: https://github.com/dragonflyoss/dragonfly/security/advisories/GHSA-c2fc-9q9c-5486
Restart Required: No
Instructions:
1. Update Dragonfly to version 2.1.0 or later. 2. Verify the update completed successfully. 3. Test proxy authentication functionality.
🔧 Temporary Workarounds
Disable Proxy Authentication
allTemporarily disable authentication for Dragonfly proxy if not required
Modify Dragonfly configuration to remove proxy authentication requirements
Network Rate Limiting
allImplement rate limiting on authentication endpoints to reduce timing attack effectiveness
Configure firewall or load balancer to limit authentication requests per IP
🧯 If You Can't Patch
- Implement network segmentation to isolate Dragonfly proxy from untrusted networks
- Use strong, complex passwords (14+ characters with mixed types) to increase attack difficulty
🔍 How to Verify
Check if Vulnerable:
Check Dragonfly version: if below 2.1.0 and using proxy authentication, system is vulnerable.Check Version:
dragonfly --version or check Dragonfly service logs for version informationVerify Fix Applied:
Confirm version is 2.1.0 or higher and test authentication with timing measurement tools.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from single source
- Unusual timing patterns in authentication logs
Network Indicators:
- High volume of authentication requests to proxy endpoints
- Requests with systematically varying password characters
SIEM Query:
source="dragonfly" AND (event="authentication_failed" OR event="auth_attempt") | stats count by src_ip