CVE-2019-15847: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-rf68-2835-83vw
Share
CVSS 7.5
CWE-331
Published
Advisory Summary

CVE-2019-15847 is a HIGH (CVSS 7.5) security vulnerability vulnerability (CWE-331: Insufficient Entropy) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.. Remediation is available in the latest vendor maintenance releases.

CVE-2019-15847 at a Glance

CVE Identifier CVE-2019-15847
GHSA Identifier GHSA-rf68-2835-83vw
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-331: Insufficient Entropy
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2019-15847

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2019-15847, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-331: Insufficient Entropy, where the product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.

References

NVD — CVE-2019-15847 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-15847
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
gcc.gnu.org/bugzilla/show_bug.c... WEB
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481
Software Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html
Software Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html
Software Security Information SECURITY
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html

Frequently Asked Questions

What is CVE-2019-15847?
CVE-2019-15847 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-331: Insufficient Entropy.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2019-15847?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2019-15847?
CVE-2019-15847 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2019-15847?
CVE-2019-15847 is classified under CWE-331: Insufficient Entropy (The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.).
How can I check Maven dependencies for CVE-2019-15847?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rf68-2835-83vw",
  "modified" : "2026-10-14T09:31:22Z",
  "published" : "2022-05-24T16:55:20Z",
  "aliases" : [ "CVE-2019-15847" ],
  "details" : "The POWER9 backend in GNU Compiler Collection (GCC) before version 10 could optimize multiple calls of the __builtin_darn intrinsic into a single call, thus reducing the entropy of the random number generator. This occurred because a volatile operation was not specified. For example, within a single execution of a program, the output of every __builtin_darn() call may be the same.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-15847"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
  }, {
    "type" : "WEB",
    "url" : "https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91481"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00056.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00057.html"
  }, {
    "type" : "WEB",
    "url" : "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00058.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-331" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2019-09-02T23:15:00Z"
  }
}