CVE-2020-5206
Last modified
CVE-2020-5206 is a critical-severity vulnerability rated 10/10 on the CVSS scale. In Opencast before 7.6 and 8.1, 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. EPSS estimates a 1.29% chance of exploitation in the next 30 days.
Description
In Opencast before 7.6 and 8.1, 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. This problem is fixed in Opencast 7.6 and Opencast 8.1
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apereo | Opencast | < 7.6 |
| Apereo | Opencast | 8.0 |
References
- https://github.com/opencast/opencast/security/advisories/GHSA-vmm6-w4cf-7f3xMitigation, Third Party Advisory
- https://github.com/opencast/opencast/security/advisories/GHSA-vmm6-w4cf-7f3xMitigation, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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