CVE-2020-5231 Opencast users with ROLE_COURSE_ADMIN can create new users

2020-01-3021:15:16

CWE-285

GitHub_M

www.cve.org

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

24.8%

JSON

In Opencast before 7.6 and 8.1, users with the role ROLE_COURSE_ADMIN can use the user-utils endpoint to create new users not including the role ROLE_ADMIN. ROLE_COURSE_ADMIN is a non-standard role in Opencast which is referenced neither in the documentation nor in any code (except for tests) but only in the security configuration. From the name – implying an admin for a specific course – users would never expect that this role allows user creation. This issue is fixed in 7.6 and 8.1 which both ship a new default security configuration.

CNA Affected

[
  {
    "product": "opencast",
    "vendor": "opencast",
    "versions": [
      {
        "status": "affected",
        "version": "< 7.6"
      },
      {
        "status": "affected",
        "version": ">= 8.0, < 8.1"
      }
    ]
  }
]