CVE-2019-10642: Contao/contao Contao CSRF Token Bypass Vulnerability

HIGH
Advisory Identifier: GHSA-hwmh-9jj9-8c9c
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CVSS 8.8
CWE-352
Published
Advisory Summary

CVE-2019-10642 is a HIGH (CVSS 8.8) contao csrf token bypass vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Contao/contao libraries in the Packagist ecosystem. The issue involves contao csrf token bypass. Remediation is available by upgrading affected packages to version 4.7.3.

CVE-2019-10642 at a Glance

CVE Identifier CVE-2019-10642
GHSA Identifier GHSA-hwmh-9jj9-8c9c
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Contao/contao
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-2019-10642

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

contao/contao fixed: 4.7.3 
Upgrade contao/contao to 4.7.3
contao/core-bundle fixed: 4.7.3 
Upgrade contao/core-bundle to 4.7.3
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 contao/contao

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-10642, inspect your project dependencies for Contao/contao:

inspect dependencies for contao/contao

Analyze the terminal output to locate any version of Contao/contao in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.7.3), 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 Contao/contao, 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

Security researcher Ali Razzaq has discovered that the request token check can be bypassed in Contao 4.7

CVE-2019-10642 Affected Contao/contao Versions

2 component(s)
Fixed Versions:
4.7.3
Product / Package Ecosystem Affected Versions Fixed Version
contao/contao
 Packagist
≥ 4.7.0
< 4.7.3
4.7.3
contao/core-bundle
 Packagist
≥ 4.7.0
< 4.7.3
4.7.3

References

NVD — CVE-2019-10642 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-10642
Security Fix Commit FIX COMMIT
https://github.com/contao/contao/commit/ee2c8130c2e68a1d0d2e75bd6b774c4393942b15
contao.org/en/news.html WEB
https://contao.org/en/news.html
Contao/contao Security Information SECURITY
https://contao.org/en/news/security-vulnerability-cve-2019-10642.html
Contao/contao Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2019-10642.yaml
Contao/contao Source Repository REPOSITORY
https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2019-10642.yaml
Contao/contao Source Repository REPOSITORY
https://github.com/contao/contao

Frequently Asked Questions

What is CVE-2019-10642?
CVE-2019-10642 is a security vulnerability in Contao/contao involving Contao CSRF Token Bypass under CWE-352: Cross-Site Request Forgery (CSRF).
Which Contao/contao versions are affected?
Affected versions include releases prior to 4.7.3 across affected packages: contao/contao, contao/core-bundle.
What version fixes CVE-2019-10642?
Upgrading to 4.7.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is contao/contao affected?
Yes, contao/contao is affected in releases prior to 4.7.3. Upgrade your dependency to 4.7.3 or later.
Is contao/core-bundle affected?
Yes, contao/core-bundle is affected in releases prior to 4.7.3. Upgrade your dependency to 4.7.3 or later.
What is the CVSS score of CVE-2019-10642?
CVE-2019-10642 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-2019-10642?
CVE-2019-10642 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-2019-10642?
Run the dependency tree command: 'inspect dependencies for contao/contao'. 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-hwmh-9jj9-8c9c",
  "modified" : "2024-04-25T23:05:47Z",
  "published" : "2022-05-14T01:09:23Z",
  "aliases" : [ "CVE-2019-10642" ],
  "summary" : "Contao CSRF Token Bypass",
  "details" : "Security researcher Ali Razzaq has discovered that the request token check can be bypassed in Contao 4.7",
  "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" : "contao/contao"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.7.0"
      }, {
        "fixed" : "4.7.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "contao/core-bundle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.7.0"
      }, {
        "fixed" : "4.7.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-10642"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/contao/contao/commit/ee2c8130c2e68a1d0d2e75bd6b774c4393942b15"
  }, {
    "type" : "WEB",
    "url" : "https://contao.org/en/news.html"
  }, {
    "type" : "WEB",
    "url" : "https://contao.org/en/news/security-vulnerability-cve-2019-10642.html"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/contao/CVE-2019-10642.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/contao/core-bundle/CVE-2019-10642.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/contao/contao"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-25T23:05:47Z",
    "nvd_published_at" : "2019-04-17T19:29:00Z"
  }
}