Is CVE-2019-12017 actively exploited?

No active exploitation of CVE-2019-12017 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-12017 be exploited remotely?

Yes. CVE-2019-12017 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-12017?

CVE-2019-12017 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2019-12017

CWE-502Published: October 24, 2019· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A remote code execution vulnerability exists in MapR CLDB code, specifically in the JSON framework that is used in the CLDB code that handles login and ticket issuance. An attacker can use the 'class' property of the JSON request sent to the CLDB to influence the JSON library's decision on which Java class this JSON request is deserialized to. By doing so, the attacker can force the MapR CLDB to construct a URLClassLoader which loads a malicious Java class from a remote path and instantiate this object in the MapR CLDB, thus executing arbitrary code on the machine running the MapR CLDB and take over the cluster. By switching to the newer Jackson library and ensuring that all incoming JSON requests are only deserialized to the same class that it was serialized from, the vulnerability is fixed. This vulnerability affects the entire MapR core platform.

NVD Source

Technical Analysis

CVE-2019-12017 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.