CVE-2023-43798

BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)

Description

BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.

Category

5.6
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: bigbluebutton bigbluebutton
Published at:
Updated at:

References

Link Tags
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-h98v-2h8w-99c4 third party advisory
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3q22-hph2-cff7 third party advisory
https://github.com/bigbluebutton/bigbluebutton/pull/18494 third party advisory
https://github.com/bigbluebutton/bigbluebutton/pull/18580 third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-43798?
CVE-2023-43798 has been scored as a medium severity vulnerability.
How to fix CVE-2023-43798?
To fix CVE-2023-43798, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-43798 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-43798 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-43798?
CVE-2023-43798 affects bigbluebutton bigbluebutton.
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