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Fencer Vulns
critical 9.8

CVE-2018-12547 json

In Eclipse OpenJ9, prior to the 0.12.0 release, the jio_snprintf() and jio_vsnprintf() native methods ignored the length parameter.

published 2019-02-11 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4507

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

In Eclipse OpenJ9, prior to the 0.12.0 release, the jio_snprintf() and jio_vsnprintf() native methods ignored the length parameter. This affects existing APIs that called the functions to exceed the allocated buffer. This functions were not directly callable by non-native user code.

Patch / fix

  • The Eclipse Foundation Eclipse OpenJ9 0.12.0
  • java-1.8.0-ibm RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-src RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-demo RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-jdbc RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-plugin RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-headless RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.8.0-ibm-webstart RHEL 8 1:1.8.0.5.35-3.el8_0
  • java-1.7.1-ibm RHEL 6 EXTRAS 1:1.7.1.4.40-1jpp.1.el6_10

red hat advisories RHSA-2019:1238RHSA-2019:0474RHSA-2019:0473RHSA-2019:0469RHSA-2019:0640RHSA-2019:0472

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-12547 updated cvss 9.8

JDK: buffer overflow in jio_snprintf() and jio_vsnprintf()

  • Red Hat Enterprise Linux 8 Supplementary java-1.8.0-ibm 1.8.0.5.35-3.el8_0, java-1.8.0-ibm-src 1.8.0.5.35-3.el8_0, java-1.8.0-ibm-demo 1.8.0.5.35-3.el8_0, java-1.8.0-ibm-jdbc 1.8.0.5.35-3.el8_0, java-1.8.0-ibm-plugin 1.8.0.5.35-3.el8_0, java-1.8.0-ibm-headless 1.8.0.5.35-3.el8_0, +1 more
    fixed: vendor fix RHSA-2019:1238
  • Red Hat Enterprise Linux Client Supplementary (v. 7) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el7, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el7, +4 more Red Hat Enterprise Linux ComputeNode Supplementary (v. 7) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm-demo 1.8.0.5.30-1jpp.1.el7
    fixed: vendor fix RHSA-2019:0473
  • Red Hat Enterprise Linux Desktop Supplementary (v. 6) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el6_10, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el6_10, +4 more Red Hat Enterprise Linux HPC Node Supplementary (v. 6) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm-demo 1.8.0.5.30-1jpp.1.el6_10 Red Hat Enterprise Linux Server Supplementary (v. 6) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el6_10, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el6_10, +4 more
    fixed: vendor fix RHSA-2019:0474
  • Red Hat Enterprise Linux Server Supplementary (v. 7) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el7, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el7, +4 more
    fixed: vendor fix RHSA-2019:0473
  • Red Hat Enterprise Linux Workstation Supplementary (v. 6) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el6_10, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el6_10, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el6_10, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el6_10, +4 more
    fixed: vendor fix RHSA-2019:0474
  • Red Hat Enterprise Linux Workstation Supplementary (v. 7) java-1.7.1-ibm 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-src 1.7.1.4.40-1jpp.1.el7, java-1.8.0-ibm-src 1.8.0.5.30-1jpp.1.el7, java-1.7.1-ibm-demo 1.7.1.4.40-1jpp.1.el7, java-1.7.1-ibm-jdbc 1.7.1.4.40-1jpp.1.el7, +4 more
    fixed: vendor fix RHSA-2019:0473
  • Red Hat Satellite 5.8 (RHEL v.6) java-1.8.0-ibm 1.8.0.5.30-1jpp.1.el6_10
    fixed: vendor fix RHSA-2019:0640

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.74% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.eclipse.org https://bugs.eclipse.org/bugs/show_bug.cgi?id=543659 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • The Eclipse Foundation Eclipse OpenJ9

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.