CVE-2023-25570
📋 TL;DR
This vulnerability in Apollo configuration management system allows unauthenticated access to the built-in Eureka service when apollo-configservice is exposed to the internet. Attackers can impersonate legitimate Apollo services to potentially manipulate configuration data. Only affects Apollo deployments with internet-facing apollo-configservice.
💻 Affected Systems
- Apollo Configuration Management System
📦 What is this software?
Apollo by Apolloconfig
⚠️ Risk & Real-World Impact
Worst Case
Attackers completely compromise Apollo configuration management, allowing them to modify application configurations across all services, potentially leading to data breaches, service disruption, or remote code execution.
Likely Case
Attackers gain unauthorized access to configuration data and can modify service configurations, leading to application misbehavior, data exposure, or denial of service.
If Mitigated
No impact if apollo-configservice is properly isolated behind network controls and not exposed to untrusted networks.
🎯 Exploit Status
Exploitation requires network access to apollo-configservice and knowledge of Apollo's Eureka service endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.0
Vendor Advisory: https://github.com/apolloconfig/apollo/security/advisories/GHSA-368x-wmmg-hq5c
Restart Required: Yes
Instructions:
1. Upgrade Apollo to version 2.1.0 or later. 2. Update all Apollo components (configservice, adminservice, portal). 3. Restart all Apollo services. 4. Verify Eureka authentication is enabled.
🔧 Temporary Workarounds
Network Isolation
allEnsure apollo-configservice is not exposed to internet or untrusted networks
# Configure firewall rules to restrict access to apollo-configservice
# Example: iptables -A INPUT -p tcp --dport 8080 -s trusted_network -j ACCEPT
# iptables -A INPUT -p tcp --dport 8080 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to prevent internet exposure of apollo-configservice
- Deploy network monitoring and intrusion detection for Apollo service ports
🔍 How to Verify
Check if Vulnerable:
Check if Apollo version is below 2.1.0 AND apollo-configservice is accessible from untrusted networksCheck Version:
Check Apollo configuration files or service logs for version informationVerify Fix Applied:
Verify Apollo version is 2.1.0+ and test that Eureka endpoints require authentication📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to Eureka endpoints
- Unexpected service registrations in Apollo logs
Network Indicators:
- External IP addresses accessing Apollo Eureka endpoints
- Unusual traffic patterns to Apollo service ports
SIEM Query:
source_ip IN (external_ips) AND dest_port IN (8080,8761) AND protocol=tcp AND application="Apollo"🔗 References
- https://github.com/apolloconfig/apollo/commit/7df79bf8df6960433ed4ff782a54e3dfc74632bd
- https://github.com/apolloconfig/apollo/pull/4663
- https://github.com/apolloconfig/apollo/releases/tag/v2.1.0
- https://github.com/apolloconfig/apollo/security/advisories/GHSA-368x-wmmg-hq5c
- https://github.com/apolloconfig/apollo/commit/7df79bf8df6960433ed4ff782a54e3dfc74632bd
- https://github.com/apolloconfig/apollo/pull/4663
- https://github.com/apolloconfig/apollo/releases/tag/v2.1.0
- https://github.com/apolloconfig/apollo/security/advisories/GHSA-368x-wmmg-hq5c
