CVE intelligence and bounded remediation

CVE-2018-12539 — Eclipse Openj9 security vulnerability

High CVSS 7.8

In Eclipse OpenJ9 version 0.8, users other than the process owner may be able to use Java Attach API to connect to an Eclipse OpenJ9 or IBM JVM on the same machine and use Attach API operations, which includes the ability to execute untrusted native code. Attach API is enabled by default on Windows, Linux and AIX JVMs and can be disabled using the command line option -Dcom.ibm.tools.attach.enable=no.

Severity
High
CVSS
7.8 (3.0)
Published
2018-08-14
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-419, CWE-502

Affected products

  • eclipse / openj9 / 0.8
  • oracle / enterprise_manager_base_platform / 13.2.0.0.0
  • oracle / enterprise_manager_base_platform / 13.3.0.0.0

Matched remediation archetype

Unsafe deserialization and object reconstruction

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Check exposure

  • Inventory serialization formats accepted from requests, queues, caches, files, cookies, and cross-service messages.
  • Trace whether untrusted input can select classes, types, callbacks, constructors, or object hooks during decoding.
  • Identify signing, schema validation, trust-boundary, and compatibility settings for each decoder.

Remediate safely

  • Replace native object deserialization with a data-only format and explicit schema validation.
  • If replacement is not immediate, use a safe decoder with a minimal type allowlist and disable polymorphic or executable hooks.
  • Update the affected library and add inert tests for unknown types, extra fields, malformed nesting, and unsigned data.

Authoritative sources

Complete CVE record and remediation plan

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