CVE-2020-15098: Typo3/cms core Missing Required Cryptographic Step Leading Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m5vr-3m74-jwxp",
  "modified" : "2021-11-19T15:43:34Z",
  "published" : "2020-07-29T16:15:19Z",
  "aliases" : [ "CVE-2020-15098" ],
  "summary" : "Missing Required Cryptographic Step Leading to Sensitive Information Disclosure in TYPO3 CMS",
  "details" : "> ### Meta\n> * CVSS: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (8.2)\n> * CWE-325, CWE-20, CWE-200, CWE-502\n\n### Problem\nIt has been discovered that an internal verification mechanism can be used to generate arbitrary checksums. This allows to inject arbitrary data having a valid cryptographic message authentication code (HMAC-SHA1) and can lead to various attack chains as described below.\n\n* [TYPO3-CORE-SA-2020-007](https://typo3.org/security/advisory/typo3-core-sa-2020-007), [CVE-2020-15099](https://nvd.nist.gov/vuln/detail/CVE-2020-15099): Potential Privilege Escalation\n  + the database server used for a TYPO3 installation must be accessible for an attacker (either via internet or shared hosting network)\n  + `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (7.5, high)\n* [TYPO3-CORE-SA-2016-013](https://typo3.org/security/advisory/typo3-core-sa-2016-013), [CVE-2016-5091](https://nvd.nist.gov/vuln/detail/CVE-2016-5091): Insecure Deserialization & Remote Code Execution\n  + an attacker must have access to at least one Extbase plugin or module action in a TYPO3 installation\n  + `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (9.1, critical)\n\nThe overall severity of this vulnerability is **high (8.2)** based on mentioned attack chains and the requirement of having a valid backend user session (authenticated).\n\n### Solution\nUpdate to TYPO3 versions 9.5.20 or 10.4.6 that fix the problem described.\n\n### Credits\nThanks to TYPO3 security team member Oliver Hader who reported and fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2020-008](https://typo3.org/security/advisory/typo3-core-sa-2020-008)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.20"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.4.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "10.0.0"
      }, {
        "fixed" : "10.4.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "typo3/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.5.20"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-m5vr-3m74-jwxp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-5091"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-15098"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/TYPO3/TYPO3.CMS/commit/85d3e70dff35a99ef53f4b561114acfa9e5c47e1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15098.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15098.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/TYPO3/TYPO3.CMS"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2016-013"
  }, {
    "type" : "WEB",
    "url" : "https://typo3.org/security/advisory/typo3-core-sa-2020-008"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-200", "CWE-325", "CWE-327", "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-07-29T16:14:21Z",
    "nvd_published_at" : "2020-07-29T17:15:00Z"
  }
}