CVE-2018-6009: Yiisoft/yii2 Yii Framework Cross-Site Request Forgery Vulnerability

HIGH
Advisory Identifier: GHSA-cwhm-272p-3wj9
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CVSS 8.8
CWE-352
Published
Advisory Summary

CVE-2018-6009 is a HIGH (CVSS 8.8) yii framework cross-site request forgery vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Yiisoft/yii2 libraries in the Packagist ecosystem. The issue involves yii framework cross-site request forgery (csrf). Remediation is available by upgrading affected packages to version 2.0.14.

CVE-2018-6009 at a Glance

CVE Identifier CVE-2018-6009
GHSA Identifier GHSA-cwhm-272p-3wj9
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Yiisoft/yii2
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2018-6009

To remediate this vulnerability, upgrade all affected Yiisoft/yii2 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

yiisoft/yii2 fixed: 2.0.14 
Upgrade yiisoft/yii2 to 2.0.14
yiisoft/yii2-dev fixed: 2.0.14 
Upgrade yiisoft/yii2-dev to 2.0.14
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 yiisoft/yii2

How to Check if You Are Affected

To determine whether your application is affected by CVE-2018-6009, inspect your project dependencies for Yiisoft/yii2:

inspect dependencies for yiisoft/yii2

Analyze the terminal output to locate any version of Yiisoft/yii2 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.14), 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 Yiisoft/yii2, 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 Yii Framework 2.x before 2.0.14, the switchIdentity function in web/User.php did not regenerate the CSRF token upon a change of identity.

CVE-2018-6009 Affected Yiisoft/yii2 Versions

2 component(s)
Fixed Versions:
2.0.14
Product / Package Ecosystem Affected Versions Fixed Version
yiisoft/yii2
 Packagist
≥ 2.0
< 2.0.14
2.0.14
yiisoft/yii2-dev
 Packagist
≥ 2.0
< 2.0.14
2.0.14

References

NVD — CVE-2018-6009 NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-6009
Security Fix Commit FIX COMMIT
https://github.com/yiisoft/yii2/commit/6c0540aa2d6e0fe0fa89e4fd35bba4be5d6cece7
Yiisoft/yii2 Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/yiisoft/yii2-dev/CVE-2018-6009.yaml
Yiisoft/yii2 Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/yiisoft/yii2/CVE-2018-6009.yaml
Yiisoft/yii2 Source Repository REPOSITORY
https://github.com/yiisoft/yii2-framework
www.yiiframework.com/news/165/yii-2-0-14... WEB
https://www.yiiframework.com/news/165/yii-2-0-14-is-released

Frequently Asked Questions

What is CVE-2018-6009?
CVE-2018-6009 is a security vulnerability in Yiisoft/yii2 involving Yii Framework Cross-Site Request Forgery (CSRF) under CWE-352: Cross-Site Request Forgery (CSRF).
Which Yiisoft/yii2 versions are affected?
Affected versions include releases prior to 2.0.14 across affected packages: yiisoft/yii2, yiisoft/yii2-dev.
What version fixes CVE-2018-6009?
Upgrading to 2.0.14 (or the latest patched release for your respective branch) resolves the vulnerability.
Is yiisoft/yii2 affected?
Yes, yiisoft/yii2 is affected in releases prior to 2.0.14. Upgrade your dependency to 2.0.14 or later.
Is yiisoft/yii2-dev affected?
Yes, yiisoft/yii2-dev is affected in releases prior to 2.0.14. Upgrade your dependency to 2.0.14 or later.
What is the CVSS score of CVE-2018-6009?
CVE-2018-6009 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2018-6009?
CVE-2018-6009 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 Packagist dependencies for CVE-2018-6009?
Run the dependency tree command: 'inspect dependencies for yiisoft/yii2'. 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-cwhm-272p-3wj9",
  "modified" : "2024-04-24T18:32:29Z",
  "published" : "2022-05-14T03:45:23Z",
  "aliases" : [ "CVE-2018-6009" ],
  "summary" : "Yii Framework Cross-Site Request Forgery (CSRF)",
  "details" : "In Yii Framework 2.x before 2.0.14, the switchIdentity function in web/User.php did not regenerate the CSRF token upon a change of identity.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "yiisoft/yii2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0"
      }, {
        "fixed" : "2.0.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "yiisoft/yii2-dev"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0"
      }, {
        "fixed" : "2.0.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-6009"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/yiisoft/yii2/commit/6c0540aa2d6e0fe0fa89e4fd35bba4be5d6cece7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/yiisoft/yii2-dev/CVE-2018-6009.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/yiisoft/yii2/CVE-2018-6009.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/yiisoft/yii2-framework"
  }, {
    "type" : "WEB",
    "url" : "https://www.yiiframework.com/news/165/yii-2-0-14-is-released"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-24T18:32:29Z",
    "nvd_published_at" : "2018-01-22T22:29:00Z"
  }
}