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The vulnerability CVE-2024-39127 is a critical remote code execution flaw in the Camunda Platform’s process engine. It arises from improper input sanitization within script task execution. An authenticated attacker with admin privileges (ROLE_ADMIN) can deploy a malicious process definition containing a script task. When this process is executed, the engine resolves and evaluates expressions within the script using the application’s Spring Expression Language (SpEL) context. This allows for arbitrary Java code execution by injecting a payload like `${T(java.lang.Runtime).getRuntime().exec(‘calc.exe’)}` into a script task. The exploit leverages the fact that the script engine resolver does not restrict access to dangerous classes, granting the attacker the same privileges as the application server.
Platform: Camunda Platform
Version: <12.16.0, <13.1.2
Vulnerability: RCE
Severity: Critical
date: 2024
Prediction: Patch Available
What Undercode Say:
`curl -s “https://docs.camunda.org/manual/latest/reference/rest/process-definition/deploy/” -X POST -H “Authorization: Bearer
`POST /engine-rest/process-definition/deploy`
`malicious.bpmn:
How Exploit:
Deploy malicious BPMN. Execute process. SpEL injection.
Protection from this CVE
Upgrade to patched versions. Disable script engine. Apply principle of least privilege.
Impact:
Arbitrary code execution. Full system compromise. Data exfiltration.
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Sources:
Reported By: github.com
Extra Source Hub:
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