CVE-2020-3419: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-gq3h-3p4j-vffv
Share
CWE-913
Published
Advisory Summary

CVE-2020-3419 is a CRITICAL security vulnerability vulnerability (CWE-913: Improper Control of Dynamically-Managed Code Resources) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.. Remediation is available in the latest vendor maintenance releases.

CVE-2020-3419 at a Glance

CVE Identifier CVE-2020-3419
GHSA Identifier GHSA-gq3h-3p4j-vffv
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-913: Improper Control of Dynamically-Managed Code Resources
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2020-3419

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-2020-3419, 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-913: Improper Control of Dynamically-Managed Code Resources, where the product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements. 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

A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to join a Webex session without appearing on the participant list. This vulnerability is due to improper handling of authentication tokens by a vulnerable Webex site. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site. A successful exploit requires the attacker to have access to join a Webex meeting, including applicable meeting join links and passwords. The attacker could then exploit this vulnerability to join meetings, without appearing in the participant list, while having full access to audio, video, chat, and screen sharing capabilities.

References

NVD — CVE-2020-3419 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-3419
Software Security Information SECURITY
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-auth-token-3vg57A5r

Frequently Asked Questions

What is CVE-2020-3419?
CVE-2020-3419 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-913: Improper Control of Dynamically-Managed Code Resources.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2020-3419?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2020-3419?
CVE-2020-3419 is classified under CWE-913: Improper Control of Dynamically-Managed Code Resources (The product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.).
How can I check Maven dependencies for CVE-2020-3419?
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-gq3h-3p4j-vffv",
  "modified" : "2022-05-24T17:34:34Z",
  "published" : "2022-05-24T17:34:34Z",
  "aliases" : [ "CVE-2020-3419" ],
  "details" : "A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to join a Webex session without appearing on the participant list. This vulnerability is due to improper handling of authentication tokens by a vulnerable Webex site. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site. A successful exploit requires the attacker to have access to join a Webex meeting, including applicable meeting join links and passwords. The attacker could then exploit this vulnerability to join meetings, without appearing in the participant list, while having full access to audio, video, chat, and screen sharing capabilities.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-3419"
  }, {
    "type" : "WEB",
    "url" : "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-auth-token-3vg57A5r"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-913" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2020-11-18T19:15:00Z"
  }
}