CVE-2020-24392: Twitter stream Improper Certificate Validation Vulnerability

MODERATE

Advisory Identifier: GHSA-p6p8-q4pj-f74m

CVSS 5.9

Published 2021-03-29

Advisory Summary

CVE-2020-24392 is a MODERATE (CVSS 5.9) improper certificate validation vulnerability (CWE-295: Improper Certificate Validation) affecting Twitter stream libraries in the RubyGems ecosystem. The issue involves improper certificate validation in twitter-stream. Remediation is available in the latest vendor maintenance releases.

CVE-2020-24392 at a Glance

CVE Identifier CVE-2020-24392

GHSA Identifier GHSA-p6p8-q4pj-f74m

Severity MODERATE

CVSS v3.1 Base Score 5.9

CWE Classification CWE-295: Improper Certificate Validation

Affected Product Twitter stream

Package Ecosystem RubyGems

Published Date 2021-03-29

Last Updated 2021-03-19

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:H/A:N).

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 High (I:H)

Availability None (A:N)

How to Fix CVE-2020-24392

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

twitter-stream fixed: Latest secure release

Upgrade twitter-stream to Latest secure release

Verify Direct and Transitive Dependencies

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

inspect dependencies for twitter-stream

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-24392, inspect your project dependencies for Twitter stream:

inspect dependencies for twitter-stream

Analyze the terminal output to locate any version of Twitter stream 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: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Twitter stream, 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

In voloko twitter-stream 0.1.16, missing TLS hostname validation allows an attacker to perform a man-in-the-middle attack against users of the library (because eventmachine is misused).

CVE-2020-24392 Affected Twitter stream Versions

1 component(s)

Product / Package	Ecosystem	Affected Versions	Fixed Version
twitter-stream gem/twitter-stream	RubyGems	≤ 0.1.16

References

NVD — CVE-2020-24392 NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-24392

Twitter stream Source Repository REPOSITORY

https://github.com/voloko/twitter-stream

GitHub Advisory / Wiki ADVISORY

https://securitylab.github.com/advisories/GHSL-2020-097-voloko-twitter-stream

Frequently Asked Questions

What is CVE-2020-24392?

CVE-2020-24392 is a security vulnerability in Twitter stream involving Improper Certificate Validation in twitter-stream under CWE-295: Improper Certificate Validation.

Which Twitter stream versions are affected?

Affected versions include releases prior to current release patches across affected packages: twitter-stream.

What version fixes CVE-2020-24392?

Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.

Is twitter-stream affected?

Yes, twitter-stream 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-2020-24392?

CVE-2020-24392 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:H/A:N.

What CWE is associated with CVE-2020-24392?

CVE-2020-24392 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).

How can I check RubyGems dependencies for CVE-2020-24392?

Run the dependency tree command: 'inspect dependencies for twitter-stream'. 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-p6p8-q4pj-f74m",
  "modified" : "2021-03-19T19:21:49Z",
  "published" : "2021-03-29T16:28:42Z",
  "aliases" : [ "CVE-2020-24392" ],
  "summary" : "Improper Certificate Validation in twitter-stream",
  "details" : "In voloko twitter-stream 0.1.16, missing TLS hostname validation allows an attacker to perform a man-in-the-middle attack against users of the library (because eventmachine is misused).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "twitter-stream"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.1.16"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-24392"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/voloko/twitter-stream"
  }, {
    "type" : "ADVISORY",
    "url" : "https://securitylab.github.com/advisories/GHSL-2020-097-voloko-twitter-stream"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-03-19T19:21:49Z",
    "nvd_published_at" : "2021-02-19T23:15:00Z"
  }
}

CVSS V3

5.9 MODERATE