CVE-2020-15098 Missing Required Cryptographic Step Leading to Sensitive Information Disclosure in TYPO3 CMS

2020-07-2916:15:25

CWE-325

CWE-20

CWE-502

CWE-200

GitHub_M

www.cve.org

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

70.7%

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, it 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 including potential privilege escalation, insecure deserialization & remote code execution. The overall severity of this vulnerability is high based on mentioned attack chains and the requirement of having a valid backend user session (authenticated). 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"
      }
    ]
  }
]