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CVE-2020-5206— Authentication Bypass For Endpoints With Anonymous Access in OpenCast

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。攻击者可利用该漏洞绕过访问限制。

CVSS 8.7 · High EPSS 1.29% · P70

Possible ATT&CK Techniques 1 AI

T1199 · Trusted Relationship
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I. Basic Information for CVE-2020-5206

Vulnerability Information
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Vulnerability Title
Authentication Bypass For Endpoints With Anonymous Access in OpenCast
Source: CVE Program / CVE List V5
Vulnerability Description
In Opencast before 7.6 and 8.1, using a remember-me cookie with an arbitrary username can cause Opencast to assume proper authentication for that user even if the remember-me cookie was incorrect given that the attacked endpoint also allows anonymous access. This way, an attacker can, for example, fake a remember-me token, assume the identity of the global system administrator and request non-public content from the search service without ever providing any proper authentication. This problem is fixed in Opencast 7.6 and Opencast 8.1
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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。攻击者可利用该漏洞绕过访问限制。
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-2020-5206

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III. Intelligence Information for CVE-2020-5206

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Patches & Fixes for CVE-2020-5206 (1)

Vendor Advisories for CVE-2020-5206 (1)

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

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
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-285

V. Comments for CVE-2020-5206

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