CVE-2020-16252: Field test Field Test CSRF Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-w542-cpp9-r3g7
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CVSS 4.3
CWE-352
Published
Advisory Summary

CVE-2020-16252 is a MODERATE (CVSS 4.3) field test csrf vulnerability vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Field test libraries in the RubyGems ecosystem. The issue involves field test csrf vulnerability. Remediation is available by upgrading affected packages to version 0.4.0.

CVE-2020-16252 at a Glance

CVE Identifier CVE-2020-16252
GHSA Identifier GHSA-w542-cpp9-r3g7
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Field test
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 4.3

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:R/S:U/C:N/I:L/A:N).

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

How to Fix CVE-2020-16252

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

field_test fixed: 0.4.0 
Upgrade field_test to 0.4.0
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 field_test

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-16252, inspect your project dependencies for Field test:

inspect dependencies for field_test

Analyze the terminal output to locate any version of Field test in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.4.0), 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-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Field test, 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 Field Test dashboard is vulnerable to cross-site request forgery (CSRF) with non-session based authentication methods in versions v0.2.0 through v0.3.2. ## Impact The Field Test dashboard is vulnerable to CSRF with non-session based authentication methods, like basic authentication. Session-based authentication methods (like Devise's default authentication) are not affected. A CSRF attack works by getting an authorized user to visit a malicious website and then performing requests on behalf of the user. In this instance, a single endpoint is affected, which allows for changing the variant assigned to a user. All users running an affected release should upgrade immediately. ## Technical Details Field Test uses the `protect_from_forgery` method from Rails to prevent CSRF. However, this defaults to `:null_session`, which has no effect on non-session based authentication methods. This has been changed to `protect_from_forgery with: :exception`.

CVE-2020-16252 Affected Field test Versions

1 component(s)
Fixed Versions:
0.4.0
Product / Package Ecosystem Affected Versions Fixed Version
field_test
gem/field_test
RubyGems
≥ 0.2.0
< 0.4.0
0.4.0

References

NVD — CVE-2020-16252 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-16252
Field test Source Repository REPOSITORY
https://github.com/ankane/field_test/issues/28
Security Fix Commit FIX COMMIT
https://github.com/ankane/field_test/commit/defd3fdf457c22d7dc5b3be7048481947bd5f0d0
Field test Source Repository REPOSITORY
https://github.com/ankane/field_test
Field test Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/field_test/CVE-2020-16252.yml

Frequently Asked Questions

What is CVE-2020-16252?
CVE-2020-16252 is a security vulnerability in Field test involving Field Test CSRF vulnerability under CWE-352: Cross-Site Request Forgery (CSRF).
Which Field test versions are affected?
Affected versions include releases prior to 0.4.0 across affected packages: field_test.
What version fixes CVE-2020-16252?
Upgrading to 0.4.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is field_test affected?
Yes, field_test is affected in releases prior to 0.4.0. Upgrade your dependency to 0.4.0 or later.
What is the CVSS score of CVE-2020-16252?
CVE-2020-16252 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2020-16252?
CVE-2020-16252 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check RubyGems dependencies for CVE-2020-16252?
Run the dependency tree command: 'inspect dependencies for field_test'. 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-w542-cpp9-r3g7",
  "modified" : "2023-07-05T20:19:49Z",
  "published" : "2020-08-05T14:53:34Z",
  "aliases" : [ "CVE-2020-16252" ],
  "summary" : "Field Test CSRF vulnerability",
  "details" : "The Field Test dashboard is vulnerable to cross-site request forgery (CSRF) with non-session based authentication methods in versions v0.2.0 through v0.3.2.\n\n## Impact\nThe Field Test dashboard is vulnerable to CSRF with non-session based authentication methods, like basic authentication. Session-based authentication methods (like Devise's default authentication) are not affected.\n\nA CSRF attack works by getting an authorized user to visit a malicious website and then performing requests on behalf of the user. In this instance, a single endpoint is affected, which allows for changing the variant assigned to a user.\n\nAll users running an affected release should upgrade immediately.\n\n## Technical Details\nField Test uses the `protect_from_forgery` method from Rails to prevent CSRF. However, this defaults to `:null_session`, which has no effect on non-session based authentication methods. This has been changed to `protect_from_forgery with: :exception`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "field_test"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.2.0"
      }, {
        "fixed" : "0.4.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.3.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-16252"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ankane/field_test/issues/28"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ankane/field_test/commit/defd3fdf457c22d7dc5b3be7048481947bd5f0d0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ankane/field_test"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/field_test/CVE-2020-16252.yml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-05T14:47:06Z",
    "nvd_published_at" : null
  }
}