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The GetAsanaObject Processor in Apache NiFi utilizes a Distribute Map Cache Client Service for state management. It employs generic Java Object serialization and deserialization without any input validation or filtering. An attacker with direct access to the configured cache server can insert maliciously crafted serialized objects. When the processor retrieves and deserializes this state information, it executes arbitrary code within the NiFi application’s context. This vulnerability stems from insecure deserialization of untrusted data, a common attack vector in Java applications. Exploitation is contingent on the processor being active and the cache server being compromised or accessible. The deserialization process allows for the invocation of dangerous Java methods, leading to full remote code execution on the host running Apache NiFi.
Platform: Apache NiFi
Version: 1.20.0-2.6.0
Vulnerability: Remote Code Execution
Severity: High
Date: 2025-12-19
Prediction: Patched 2.7.0
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Showing bash commands and codes related to the blog
Check NiFi version
bin/nifi.sh status
List installed NARs
ls lib/.nar
Remove vulnerable processor bundle
rm lib/nifi-asana-processors-nar-.nar
Sample serialization payload (illustrative)
java -jar ysoserial.jar CommonsCollections4 ‘id’
how Exploit:
Compromise cache server.
Insert malicious serialized object.
Trigger processor deserialization.
Execute arbitrary commands.
Protection from this CVE
Upgrade to 2.7.0.
Remove vulnerable processor bundle.
Restrict cache server access.
Use JSON serialization.
Impact:
Remote Code Execution.
Full system compromise.
Data breach potential.
Service disruption.
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Sources:
Reported By: github.com
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