`CVE-2018-12539` Eclipse OpenJ9

Affected software	Eclipse OpenJ9
Severity	7.8 High CVSS 3.0 2 scores
Weakness	Deserialization of untrusted data (CWE-502)
Published	14 Aug 2018
Updated	17 Jun 2026

Description

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.

CWE-419

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 8 years ago.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment no assessment published
Indexed PoC none indexed
EPSS 0.49% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Protection full Deserialization, Process
Action available security rule
Review automated Inferred
Record active

Decided by	A vulnerability class already blocked by an ARMR security rule
Finding	Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-502: Deserialization of Untrusted Data.
Candidate fix	https://access.redhat.com/security/cve/CVE-2018-12539 : a Red Hat CVE page: the weakest kind, naming no commit, though it shows Red Hat has looked at the CVE

Decided by

A vulnerability class already blocked by an ARMR security rule

Finding

Protected by Waratek's ARMR deserialization security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-502: Deserialization of Untrusted Data.

Candidate fix

https://access.redhat.com/security/cve/CVE-2018-12539 : a Red Hat CVE page: the weakest kind, naming no commit, though it shows Red Hat has looked at the CVE

How to mitigate CVE-2018-12539

Apply the vendor's fix for Eclipse OpenJ9. Until you can, Waratek RASP blocks exploitation with its deserialization and process rules. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

7.8 HIGH v3.0 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.0 7.8 HIGH CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H NVD Primary published

CVSS 2.0 4.6 none AV:L/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.0	7.8	HIGH	`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`	NVD	Primary	published
CVSS 2.0	4.6	none	`AV:L/AC:L/Au:N/C:P/I:P/A:P`	NVD	Primary

Affected software and releases

Products and versions

2 products, 3 version entries

Source	Vendor	Product	Scheme	Affected versions
nvd	eclipse	openj9	generic	0.8
nvd	oracle	enterprise manager base platform	generic	13.2.0.0.0 · 13.3.0.0.0

Source

Vendor

Product

Scheme

Affected versions

nvd

eclipse

openj9

generic

0.8

nvd

oracle

enterprise manager base platform

generic

13.2.0.0.0 · 13.3.0.0.0

References

URL	Tags
https://access.redhat.com/security/cve/CVE-2018-12539	redhat-cve
https://access.redhat.com/errata/RHSA-2018:2568	ADVISORY, RHSA-2018:2568
https://access.redhat.com/errata/RHSA-2018:2575	ADVISORY, RHSA-2018:2575
https://access.redhat.com/errata/RHSA-2018:2713	ADVISORY, RHSA-2018:2713
http://www.securityfocus.com/bid/105126	Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041765	Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHSA-2018:2569	Not Applicable, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2576	Not Applicable, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2712	Not Applicable, Third Party Advisory
https://bugs.eclipse.org/bugs/show_bug.cgi?id=534589	Issue Tracking, Third Party Advisory

URL

Timeline

Published	2018-08-14	By the CVE Program.
NVD record modified	2026-06-17	NVD's own last-modified date for this record.

Published

2018-08-14

By the CVE Program.

NVD record modified

2026-06-17

NVD's own last-modified date for this record.

How VRT decided (19 of 24 rules ran)

19 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven no match An OSV.dev record of this CVE affecting a package published to Maven Central. When every such package is one business applications do not use (Minecraft mods and launchers, Fastjson) and no tracked product is named by CPE, it settles the CVE as Outside Waratek scope instead

10 cna-maven-package no match An affected Maven artifact named by the CNA itself

11 known-cpe-product matched In scope Matches known products: eclipse/openj9, oracle/enterprise_manager_base_platform

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint matched Mitigation candidate References include candidate fix URL (redhat-cve tier): https://access.redhat.com/security/cve/CVE-2018-12539 (from RHSA-2018:2568)

18 open-source-maven skipped The affected package being open source on Maven, so the fix can be read

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match decided it matched Protected by Waratek CWE-502 (Deserialization of Untrusted Data) is mitigable by an ARMR deserialization security rule.

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold skipped Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published skipped Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

eclipse openj9 tracked cpe:2.3:a:eclipse:openj9:0.8:*:*:*:*:*:*:* yaml

oracle enterprise_manager_base_platform tracked cpe:2.3:a:oracle:enterprise_manager_base_platform:13.2.0.0.0:*:*:*:*:*:*:* yaml

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