CVE-2020-35216: Atomix Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-6vvh-5794-vpmj
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CVSS 5.9
CWE-362
Published
Advisory Summary

CVE-2020-35216 is a MODERATE (CVSS 5.9) denial of service vulnerability (CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')) affecting Atomix libraries in the Maven ecosystem. The issue involves an issue in atomix v3.1.5 allows attackers to cause a denial of service (dos) via false member down event messages.. Remediation is available in the latest vendor maintenance releases.

CVE-2020-35216 at a Glance

CVE Identifier CVE-2020-35216
GHSA Identifier GHSA-6vvh-5794-vpmj
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Affected Product Atomix
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.9

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

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

How to Fix CVE-2020-35216

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

io.atomix:atomix fixed: Latest secure release 
<dependency>
    <groupId>io.atomix</groupId>
    <artifactId>atomix</artifactId>
    <version>Latest secure release</version>
</dependency>
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 -Dincludes=io.atomix

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-35216, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=io.atomix

Analyze the terminal output to locate any version of Atomix 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 -Dincludes=io.atomix 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-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'), where the product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently. In Atomix, 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

An issue in Atomix v3.1.5 allows attackers to cause a denial of service (DoS) via false member down event messages.

CVE-2020-35216 Affected Atomix Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
io.atomix:atomix
maven/io.atomix/atomix
Maven
≤ 3.1.5

References

NVD — CVE-2020-35216 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35216
docs.google.com/presentation/d/1wox... WEB
https://docs.google.com/presentation/d/1woXwR3vciv7ltFan6LyK5vsWXmaUi8ArZonhk80Gr5U/edit?usp=sharing
Atomix Source Repository REPOSITORY
https://github.com/atomix/atomix

Frequently Asked Questions

What is CVE-2020-35216?
CVE-2020-35216 is a security vulnerability in Atomix involving An issue in Atomix v3.1.5 allows attackers to cause a denial of service (DoS) via false member down event messages. under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition').
Which Atomix versions are affected?
Affected versions include releases prior to current release patches across affected packages: io.atomix:atomix.
What version fixes CVE-2020-35216?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is atomix affected?
Yes, io.atomix:atomix is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-35216?
CVE-2020-35216 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-35216?
CVE-2020-35216 is classified under CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.).
How can I check Maven dependencies for CVE-2020-35216?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=io.atomix'. 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-6vvh-5794-vpmj",
  "modified" : "2022-01-04T18:57:26Z",
  "published" : "2021-12-17T20:40:58Z",
  "aliases" : [ "CVE-2020-35216" ],
  "summary" : "An issue in Atomix v3.1.5 allows attackers to cause a denial of service (DoS) via false member down event messages.",
  "details" : "An issue in Atomix v3.1.5 allows attackers to cause a denial of service (DoS) via false member down event messages.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "io.atomix:atomix"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.1.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35216"
  }, {
    "type" : "WEB",
    "url" : "https://docs.google.com/presentation/d/1woXwR3vciv7ltFan6LyK5vsWXmaUi8ArZonhk80Gr5U/edit?usp=sharing"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/atomix/atomix"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-362" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-12-17T15:12:52Z",
    "nvd_published_at" : "2021-12-16T20:15:00Z"
  }
}