CVE-2020-5206 – org.opencastproject:opencast-kernel

Package

Manager: maven
Name: org.opencastproject:opencast-kernel
Vulnerable Version: >=0 <7.6 || >=8.0 <8.1

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

EPSS: 0.00296 pctl0.52412

Details

Authentication Bypass For Endpoints With Anonymous Access in Opencast ### Impact Using a remember-me cookie with an arbitrary username can cause Opencast to assume proper authentication for that user even if the remember-me cookie was incorrect given that the attacked endpoint also allows anonymous access. This way, an attacker can, for example, fake a remember-me token, assume the identity of the global system administrator and request non-public content from the search service without ever providing any proper authentication. ### Patches This problem is fixed in Opencast 7.6 and Opencast 8.1 ### Workarounds As a workaround for older, unpatched versions, disabling remember-me cookies in `etc/security/mh_default_org.xml` will mitigate the problem but will obviously also disable this feature without obvious indication. To deactivate this, remove the following line from the security configuration: ```xml <sec:remember-me … /> ``` ### References - [Remember-me cookie in the security configuration file](https://github.com/opencast/opencast/blob/161ee619382f144dc35eea211fc6b556025b98e1/etc/security/mh_default_org.xml#L335-L336) ### For more information If you have any questions or comments about this advisory: - Open an issue in [opencast/opencast](https://github.com/opencast/opencast/issues) - For security-relevant information, email us at security@opencast.org

Metadata

Created: 2020-01-30T21:21:30Z
Modified: 2021-10-20T18:03:07Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/01/GHSA-vmm6-w4cf-7f3x/GHSA-vmm6-w4cf-7f3x.json
CWE IDs: ["CWE-285"]
Alternative ID: GHSA-vmm6-w4cf-7f3x
Finding: F039
Auto approve: 1