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CVE-2020-5229— Opencast stores passwords using outdated MD5 hash algorithm

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 8.1之前版本和7.6之前版本中存在加密问题漏洞，该漏洞源于程序使用过时且不安全的MD5哈希算法来存储密码并且使用用户名来对哈希值加盐。远程攻击者可利用该漏洞获取敏感信息。

CVSS 7.7 · High EPSS 0.63% · P49
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I. Basic Information for CVE-2020-5229

Vulnerability Information
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Vulnerability Title
Opencast stores passwords using outdated MD5 hash algorithm
Source: CVE Program / CVE List V5
Vulnerability Description
Opencast before 8.1 stores passwords using the rather outdated and cryptographically insecure MD5 hash algorithm. Furthermore, the hashes are salted using the username instead of a random salt, causing hashes for users with the same username and password to collide which is problematic especially for popular users like the default `admin` user. This essentially means that for an attacker, it might be feasible to reconstruct a user's password given access to these hashes. Note that attackers needing access to the hashes means that they must gain access to the database in which these are stored first to be able to start cracking the passwords. The problem is addressed in Opencast 8.1 which now uses the modern and much stronger bcrypt password hashing algorithm for storing passwords. Note, that old hashes remain MD5 until the password is updated. For a list of users whose password hashes are stored using MD5, take a look at the `/user-utils/users/md5.json` REST endpoint.
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
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5
Vulnerability Title
Apereo Opencast 加密问题漏洞
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 8.1之前版本和7.6之前版本中存在加密问题漏洞，该漏洞源于程序使用过时且不安全的MD5哈希算法来存储密码并且使用用户名来对哈希值加盐。远程攻击者可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 < 8.1 -

II. Public POCs for CVE-2020-5229

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III. Intelligence Information for CVE-2020-5229

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Patches & Fixes for CVE-2020-5229 (1)

Vendor Advisories for CVE-2020-5229 (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-2020-5230 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-327

V. Comments for CVE-2020-5229

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