{
  "schema_version": "1.4.0",
  "id": "GHSA-q39c-5vh5-vw2p",
  "modified": "2021-07-26T18:43:04Z",
  "published": "2021-08-02T16:47:10Z",
  "aliases": [
    "CVE-2020-27178"
  ],
  "summary": "Improper Authentication in Apereo CAS",
  "details": "Apereo CAS 5.3.x before 5.3.16, 6.x before 6.1.7.2, 6.2.x before 6.2.4, and 6.3.x before 6.3.0-RC4 mishandles secret keys with Google Authenticator for multifactor authentication.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-webapp"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "5.3.0"
            },
            {
              "fixed": "5.3.16"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-webapp"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.1.7.2"
            }
          ]
        }
      ],
      "database_specific": {
        "last_known_affected_version_range": "<= 6.1.7.1"
      }
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-webapp"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.2.4"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-support-otp-mfa-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "5.3.0"
            },
            {
              "fixed": "5.3.16"
            }
          ]
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-support-otp-mfa-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.1.7.2"
            }
          ]
        }
      ],
      "database_specific": {
        "last_known_affected_version_range": "<= 6.1.7.1"
      }
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apereo.cas:cas-server-support-otp-mfa-core"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.2.4"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-27178"
    },
    {
      "type": "WEB",
      "url": "https://apereo.github.io/2020/10/14/gauthvuln"
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2021-07-26T18:43:04Z",
    "nvd_published_at": "2020-10-16T16:15:00Z"
  }
}