GHSA-4VPC-5JX4-CFQG

Vulnerability from github – Published: 2019-12-02 18:09 – Updated: 2021-07-28 15:49
VLAI?
Summary
User enumeration leak using switch user functionality in Symfony
Details

An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7. The ability to enumerate users was possible due to different handling depending on whether the user existed when making unauthorized attempts to use the switch users functionality. This is related to symfony/security.

Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/security-http"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.1.0"
            },
            {
              "fixed": "4.2.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/security-http"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "4.3.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.1.0"
            },
            {
              "fixed": "4.2.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "symfony/symfony"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "4.3.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2019-18886"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-203"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2019-12-01T19:47:26Z",
    "nvd_published_at": "2019-11-21T18:15:00Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7. The ability to enumerate users was possible due to different handling depending on whether the user existed when making unauthorized attempts to use the switch users functionality. This is related to symfony/security.",
  "id": "GHSA-4vpc-5jx4-cfqg",
  "modified": "2021-07-28T15:49:16Z",
  "published": "2019-12-02T18:09:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-18886"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2019-18886.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18886.yaml"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v4.3.8"
    },
    {
      "type": "WEB",
      "url": "https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality"
    },
    {
      "type": "WEB",
      "url": "https://symfony.com/blog/symfony-4-3-8-released"
    },
    {
      "type": "WEB",
      "url": "https://symfony.com/cve-2019-18886"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "User enumeration leak using switch user functionality in Symfony"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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