CVE-2020-5206GHSA-VMM6-W4CF-7F3X
Authentication Bypass For Endpoints With Anonymous Access in OpenCast
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 7.6, 8.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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
Timeline
- CVE published
- Record last updated
Affected versions
- opencast opencast
fixed in 7.6; From 8.0 · fixed in 8.1
- org.opencastproject:opencast-kernelMaven
fixed in 7.6
- org.opencastproject:opencast-kernelMaven
From 8.0 · fixed in 8.1