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CVE-2020-5228— Opencast allows unauthorized public access via OAI-PMH

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。 Opencast 8.1之前版本和7.6之前版本存在安全漏洞，该漏洞源于不当的访问控制。远程攻击者可通过使用AI-PMH利用该漏洞获取敏感信息。

CVSS 7.6 · High EPSS 0.98% · P61

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2020-5228

Vulnerability Information
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Vulnerability Title
Opencast allows unauthorized public access via OAI-PMH
Source: CVE Program / CVE List V5
Vulnerability Description
Opencast before 8.1 and 7.6 allows unauthorized public access to all media and metadata by default via OAI-PMH. OAI-PMH is part of the default workflow and is activated by default, requiring active user intervention of users to protect media. This leads to users unknowingly handing out public access to events without their knowledge. The problem has been addressed in Opencast 7.6 and 8.1 where the OAI-PMH endpoint is configured to require users with `ROLE_ADMIN` by default. In addition to this, Opencast 9 removes the OAI-PMH publication from the default workflow, making the publication a conscious decision users have to make by updating their workflows.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Opencast 安全漏洞
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。 Opencast 8.1之前版本和7.6之前版本存在安全漏洞，该漏洞源于不当的访问控制。远程攻击者可通过使用AI-PMH利用该漏洞获取敏感信息。
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-2020-5228

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III. Intelligence Information for CVE-2020-5228

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Vendor Advisories for CVE-2020-5228 (1)

Other References for CVE-2020-5228 (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-2020-5222 6.8 MEDIUM Hard-Coded Key Used For Remember-me Token in OpenCast
CVE-2020-5231 4.8 MEDIUM Opencast users with ROLE_COURSE_ADMIN can create new users

IV. Related Vulnerabilities

Same product: opencast
Same vendor: opencast
Same weakness: CWE-862

V. Comments for CVE-2020-5228

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