CVE-2024-27905
📋 TL;DR
This vulnerability in Apache Aurora allows unauthenticated attackers to exploit an information disclosure endpoint as a padding oracle to forge valid authentication cookies. This could potentially lead to authentication bypass and, when combined with other vulnerabilities, remote code execution. Only affects retired Apache Aurora installations that are no longer supported.
💻 Affected Systems
- Apache Aurora
📦 What is this software?
Aurora by Apache
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution through authentication bypass combined with other vulnerabilities, potentially leading to full system compromise.
Likely Case
Authentication bypass allowing unauthorized access to sensitive Aurora functionality and data.
If Mitigated
Limited information disclosure about internal system state without authentication bypass.
🎯 Exploit Status
Requires understanding of padding oracle attacks but no authentication needed. Could be combined with other vulnerabilities for RCE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None - project retired
Vendor Advisory: https://lists.apache.org/thread/564kbv3wqdzkscmdn2bg4vlk48qymryp
Restart Required: No
Instructions:
No official patch available. Project maintainers recommend migrating to alternative solutions.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to Apache Aurora instances to trusted networks only
Use firewall rules to limit access: iptables -A INPUT -p tcp --dport [aurora_port] -s [trusted_network] -j ACCEPT
iptables -A INPUT -p tcp --dport [aurora_port] -j DROP
Authentication Layer
allAdd additional authentication layer in front of Aurora
Configure reverse proxy with authentication: nginx or apache with auth_basic
Implement IP whitelisting at load balancer level
🧯 If You Can't Patch
- Migrate to alternative scheduler/orchestration system (Mesos with Marathon, Kubernetes, Nomad)
- Isolate Aurora instances in separate network segments with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check if Apache Aurora is running and accessible without authentication. Test endpoint exposure using curl: curl -v http://[aurora_host]:[port]/apiCheck Version:
Check Aurora version via API: curl http://[aurora_host]:[port]/api/v1/version or check running processVerify Fix Applied:
Verify network restrictions are in place by testing access from unauthorized networks. Confirm additional authentication layer requires credentials.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts from new IPs
- Multiple failed authentication attempts followed by successful login
- Access to sensitive endpoints without authentication logs
Network Indicators:
- Unusual traffic patterns to Aurora authentication endpoints
- Multiple requests to padding oracle endpoint from single source
- Traffic from unexpected networks to Aurora ports
SIEM Query:
source="aurora.log" AND ("authentication" OR "cookie") AND status="200" AND src_ip NOT IN [trusted_networks]