CVE-2020-5222
This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.94% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-798
- Affected
- apereo/opencast
- Source
- security-advisories@github.com
References
- https://github.com/opencast/opencast/commit/1a7172c95af8d542a77ae5b153e4c834dd4788a6Patch
- https://github.com/opencast/opencast/security/advisories/GHSA-mh8g-hprg-8363Mitigation, Third Party Advisory
- https://github.com/opencast/opencast/commit/1a7172c95af8d542a77ae5b153e4c834dd4788a6Patch
- https://github.com/opencast/opencast/security/advisories/GHSA-mh8g-hprg-8363Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.