CVE-2020-27611 Server-side request forgery in n/a

High 7.3 Published 21 Oct 2020 Updated 4 Aug 2024

BigBlueButton uses third-party STUN/TURN resources, potentially allowing attackers to access unintended internal endpoints via Server-Side Request Forgery.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-27611?

CVE-2020-27611 is a high-severity server-side request forgery vulnerability in n/a, published on 21 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

BigBlueButton through 2.2.28 uses STUN/TURN resources from a third party, which may represent an unintended endpoint.

Weakness: CWE-327

Which versions are affected by CVE-2020-27611?

It affects 1 product.

Products include Bigbluebutton Bigbluebutton.

How do I fix CVE-2020-27611?

No fix has been published for CVE-2020-27611 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2020-27611 being exploited?

There is no known exploitation of CVE-2020-27611 in the wild and no public exploit code.

Sources

Also known as GHSA-2pxm-qg5m-jmf9.