CVE-2020-5656: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-f9w6-p56j-vxgh
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Advisory Summary

CVE-2020-5656 is a CRITICAL security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2020-5656 at a Glance

CVE Identifier CVE-2020-5656
GHSA Identifier GHSA-f9w6-p56j-vxgh
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2020-5656

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-2020-5656, 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 General Security Weakness. 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

Improper access control vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

References

NVD — CVE-2020-5656 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-5656
jvn.jp/vu/jvnvu92513419/in... WEB
https://jvn.jp/vu/JVNVU92513419/index.html
www.mitsubishielectric.co.jp/psirt/vulnerability... WEB
https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdf
www.mitsubishielectric.com/en/psirt/vulnerabil... WEB
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-012_en.pdf

Frequently Asked Questions

What is CVE-2020-5656?
CVE-2020-5656 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2020-5656?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2020-5656?
CVE-2020-5656 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2020-5656?
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-f9w6-p56j-vxgh",
  "modified" : "2022-05-24T17:33:04Z",
  "published" : "2022-05-24T17:33:04Z",
  "aliases" : [ "CVE-2020-5656" ],
  "details" : "Improper access control vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-5656"
  }, {
    "type" : "WEB",
    "url" : "https://jvn.jp/vu/JVNVU92513419/index.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.mitsubishielectric.co.jp/psirt/vulnerability/pdf/2020-012.pdf"
  }, {
    "type" : "WEB",
    "url" : "https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-012_en.pdf"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2020-11-02T21:15:00Z"
  }
}