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

Quick assessment

Affected
opencast opencast
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Opencast是Opencast组织的一款用于大规模自动视频捕获，管理和分发的直播视频支撑软件。 Apereo Opencast 7.6之前版本和8.1之前版本中存在授权问题漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。

CVSS 4.8 · Medium EPSS 0.62% · P48
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I. Basic Information for CVE-2020-5231

Vulnerability Information
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Vulnerability Title
Opencast users with ROLE_COURSE_ADMIN can create new users
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apereo Opencast 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Opencast是Opencast组织的一款用于大规模自动视频捕获，管理和分发的直播视频支撑软件。 Apereo Opencast 7.6之前版本和8.1之前版本中存在授权问题漏洞。该漏洞源于网络系统或产品中缺少身份验证措施或身份验证强度不足。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opencast opencast < 7.6 -

II. Public POCs for CVE-2020-5231

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III. Intelligence Information for CVE-2020-5231

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Patches & Fixes for CVE-2020-5231 (1)

Vendor Advisories for CVE-2020-5231 (1)

Same Patch Batch · opencast · 2020-01-30 · 6 CVEs total

CVE-2020-5206 8.7 HIGH Authentication Bypass For Endpoints With Anonymous Access in OpenCast
CVE-2020-5229 7.7 HIGH Opencast stores passwords using outdated MD5 hash algorithm
CVE-2020-5230 7.7 HIGH Opencast uses unsafe identifiers
CVE-2020-5228 7.6 HIGH Opencast allows unauthorized public access via OAI-PMH
CVE-2020-5222 6.8 MEDIUM Hard-Coded Key Used For Remember-me Token in OpenCast

IV. Related Vulnerabilities

Same product: opencast
Same vendor: opencast
Same weakness: CWE-285

V. Comments for CVE-2020-5231

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