CVE-2020-27603 Server-side request forgery in n/a

High 7.5 Published 21 Oct 2020 Updated 4 Aug 2024

Attackers can exploit unsafe JODConverter settings in BigBlueButton to access external files via LibreOffice document conversions.

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-2020-27603?

CVE-2020-27603 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 before 2.2.27 has an unsafe JODConverter setting in which LibreOffice document conversions can access external files.

Which versions are affected by CVE-2020-27603?

It affects 1 product.

Products include Bigbluebutton Bigbluebutton.

How do I fix CVE-2020-27603?

No fix has been published for CVE-2020-27603 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-2020-27603 being exploited?

There is no known exploitation of CVE-2020-27603 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-6495-493q-rhcr.