CVE-2020-5229 Information

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Opencast before 8.1 stores passwords using the rather outdated and cryptographically insecure MD5 hash algorithm.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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Reference

https://github.com/opencast/opencast/commit/32bfbe5f78e214e2d589f92050228b91d704758e https://github.com/opencast/opencast/security/advisories/GHSA-h362-m8f2-5x7c

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

8.1