CVE-2021-29715
📋 TL;DR
IBM API Connect versions 5.0.0.0 through 5.0.8.11 have open ports that could allow remote attackers to obtain sensitive information or conduct denial-of-service attacks. This affects organizations using vulnerable versions of IBM API Connect, particularly those with internet-facing deployments.
💻 Affected Systems
- IBM API Connect
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker could extract sensitive configuration data, credentials, or API keys, and potentially disrupt service availability through DoS attacks.
Likely Case
Information disclosure of system configuration or API metadata, potentially enabling further attacks or reconnaissance.
If Mitigated
Limited impact if proper network segmentation and firewall rules restrict access to management ports.
🎯 Exploit Status
Exploitation involves connecting to open ports, which requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.8.12 and later
Vendor Advisory: https://www.ibm.com/support/pages/node/6483653
Restart Required: Yes
Instructions:
1. Download IBM API Connect version 5.0.8.12 or later from IBM Fix Central. 2. Follow IBM's upgrade documentation for your deployment type. 3. Restart all API Connect components after upgrade.
🔧 Temporary Workarounds
Firewall Port Restriction
linuxRestrict access to API Connect management ports using firewall rules.
iptables -A INPUT -p tcp --dport [PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [PORT] -j DROP
Network Segmentation
allPlace API Connect management interfaces on isolated network segments.
🧯 If You Can't Patch
- Implement strict network access controls to limit which IPs can connect to API Connect management ports.
- Monitor network traffic to API Connect management ports for unauthorized access attempts.
🔍 How to Verify
Check if Vulnerable:
Check IBM API Connect version via management console or command: apic versionCheck Version:
apic versionVerify Fix Applied:
Verify version is 5.0.8.12 or later and test that management ports are not unnecessarily exposed.📡 Detection & Monitoring
Log Indicators:
- Unauthorized connection attempts to API Connect management ports
- Unexpected data extraction patterns
Network Indicators:
- Unusual traffic to API Connect management ports from untrusted sources
- Port scanning activity targeting API Connect
SIEM Query:
source_ip NOT IN (trusted_ips) AND dest_port IN (management_ports)