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CVE-2020-5230— Opencast uses unsafe identifiers

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.

Apereo Opencast 7.6之前版本和8.1之前版本中存在注入漏洞。攻击者可利用该漏洞向工作目录之外的位置写入文件。

CVSS 7.7 · High EPSS 1.17% · P66
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I. Basic Information for CVE-2020-5230

Vulnerability Information
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Vulnerability Title
Opencast uses unsafe identifiers
Source: CVE Program / CVE List V5
Vulnerability Description
Opencast before 8.1 and 7.6 allows almost arbitrary identifiers for media packages and elements to be used. This can be problematic for operation and security since such identifiers are sometimes used for file system operations which may lead to an attacker being able to escape working directories and write files to other locations. In addition, Opencast's Id.toString(…) vs Id.compact(…) behavior, the latter trying to mitigate some of the file system problems, can cause errors due to identifier mismatch since an identifier may unintentionally change. This issue is fixed in Opencast 7.6 and 8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对资源描述符的控制不恰当(资源注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Apereo Opencast 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apereo Opencast 7.6之前版本和8.1之前版本中存在注入漏洞。攻击者可利用该漏洞向工作目录之外的位置写入文件。
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-2020-5230

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III. Intelligence Information for CVE-2020-5230

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Patches & Fixes for CVE-2020-5230 (1)

Vendor Advisories for CVE-2020-5230 (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-2020-5228 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-99

V. Comments for CVE-2020-5230

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