CVE-2020-15099 Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS

2020-07-2916:15:15

CWE-20

CWE-200

GitHub_M

www.cve.org

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

8.4 High

AI Score

Confidence

High

0.009 Low

EPSS

Percentile

83.2%

JSON

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, in a case where an attacker manages to generate a valid cryptographic message authentication code (HMAC-SHA1) - either by using a different existing vulnerability or in case the internal encryptionKey was exposed - it is possible to retrieve arbitrary files of a TYPO3 installation. This includes the possibility to fetch typo3conf/LocalConfiguration.php, which again contains the encryptionKey as well as credentials of the database management system being used. In case a database server is directly accessible either via internet or in a shared hosting network, this allows the ability to completely retrieve, manipulate or delete database contents. This includes creating an administration user account - which can be used to trigger remote code execution by injecting custom extensions. This has been patched in versions 9.5.20 and 10.4.6.

CNA Affected

[
  {
    "product": "TYPO3 CMS",
    "vendor": "TYPO3",
    "versions": [
      {
        "status": "affected",
        "version": ">= 9.0.0, < 9.5.20"
      },
      {
        "status": "affected",
        "version": ">= 10.0.0, 10.4.6"
      }
    ]
  }
]