CVE-2025-27526
📋 TL;DR
This CVE describes a deserialization vulnerability in Apache InLong that allows attackers to bypass security controls through JDBC URL encoding and backspace character manipulation. It affects Apache InLong versions 1.13.0 through 2.1.0, potentially enabling remote code execution or data manipulation. Organizations running affected versions of Apache InLong are at risk.
💻 Affected Systems
- Apache InLong
📦 What is this software?
Inlong by Apache
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or ransomware deployment.
Likely Case
Data manipulation, privilege escalation, or unauthorized access to backend systems through JDBC connections.
If Mitigated
Limited impact due to network segmentation, input validation, or restricted JDBC connections.
🎯 Exploit Status
Exploitation requires understanding of deserialization attacks and JDBC URL manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.0
Vendor Advisory: https://lists.apache.org/thread/4t4sqscm7xdqn883dyjy40qk6ncf26xf
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download Apache InLong 2.2.0 from official sources. 3. Stop the InLong service. 4. Replace with version 2.2.0. 5. Restart the service. 6. Verify functionality.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to InLong instances to trusted sources only.
iptables -A INPUT -p tcp --dport [INLONG_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [INLONG_PORT] -j DROP
Input Validation Filter
allImplement WAF or proxy rules to filter malicious payloads.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate InLong instances from critical systems.
- Monitor for unusual JDBC connection attempts and deserialization errors in logs.
🔍 How to Verify
Check if Vulnerable:
Check the InLong version via web interface or configuration files. If version is between 1.13.0 and 2.1.0 inclusive, it is vulnerable.Check Version:
grep -i version /path/to/inlong/conf/*.properties 2>/dev/null || echo 'Check web interface or documentation'Verify Fix Applied:
Verify version is 2.2.0 or higher and test JDBC functionality to ensure no regression.📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors
- Suspicious JDBC URL patterns with encoded characters
- Backspace characters in connection strings
Network Indicators:
- Unexpected outbound connections from InLong instances
- JDBC connections to unusual databases
SIEM Query:
source="inlong.log" AND ("deserialization" OR "jdbc" OR "urlencode")