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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWgzNjItbThmMi01eDdj
Password Hashing: Do not use MD5
Impact
User passwords are stored in the database using the rather outdated and cryptographically insecure MD5 hash algorithm.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.
Patches
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.
Workarounds
There is no workaround.
References
For more information
If you have any questions or comments about this advisory:
- Open an issue in opencast/opencast
- For security-relevant information, email us at [email protected]
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWgzNjItbThmMi01eDdj
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: over 4 years ago
Updated: over 1 year ago
CVSS Score: 7.7
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Identifiers: GHSA-h362-m8f2-5x7c, CVE-2020-5229
References:
- https://github.com/opencast/opencast/security/advisories/GHSA-h362-m8f2-5x7c
- https://github.com/opencast/opencast/commit/32bfbe5f78e214e2d589f92050228b91d704758e
- https://nvd.nist.gov/vuln/detail/CVE-2020-5229
- https://github.com/advisories/GHSA-h362-m8f2-5x7c
Blast Radius: 11.9
Affected Packages
maven:org.opencastproject:opencast-common-jpa-impl
Dependent packages: 14Dependent repositories: 35
Downloads:
Affected Version Ranges: >= 8.0, < 8.1, < 7.6
Fixed in: 8.1, 7.6
All affected versions:
All unaffected versions: