CVE-2024-38518 bbb-web API additional parameters considered
Attackers with valid join links can escalate privileges to moderator by injecting parameters into signed join URLs, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-38518?
CVE-2024-38518 is a medium-severity vulnerability in bigbluebutton, published on 28 Jun 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be "role=moderator", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.
Weakness: CWE-284
Which versions are affected by CVE-2024-38518?
How do I fix CVE-2024-38518?
No fix has been published for CVE-2024-38518 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-38518 being exploited?
There is no known exploitation of CVE-2024-38518 in the wild and no public exploit code.
Sources
Also known as GHSA-4m48-49h7-f3c4.