CVE-2023-43798: BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)
First published: Mon Oct 30 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Bigbluebutton Bigbluebutton | <2.6.12 | |
| Bigbluebutton Bigbluebutton | =2.7.0-alpha1 | |
| Bigbluebutton Bigbluebutton | =2.7.0-alpha2 | |
| Bigbluebutton Bigbluebutton | =2.7.0-alpha3 | |
| Bigbluebutton Bigbluebutton | =2.7.0-beta1 | |
| Bigbluebutton Bigbluebutton | =2.7.0-beta2 | |
| Bigbluebutton Bigbluebutton | =2.7.0-beta3 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-43798?
CVE-2023-43798 is a vulnerability in BigBlueButton that allows for Server-Side Request Forgery (SSRF) when uploading a presentation.
What is the severity of CVE-2023-43798?
The severity of CVE-2023-43798 is medium with a CVSS score of 5.6.
How does CVE-2023-43798 affect BigBlueButton?
CVE-2023-43798 affects BigBlueButton versions prior to 2.6.12 and 2.7.0-rc.1.
Is there a patch available for CVE-2023-43798?
Yes, a patch is available in BigBlueButton versions 2.6.12 and 2.7.0-rc.1.
How can I mitigate CVE-2023-43798?
To mitigate CVE-2023-43798, make sure to update your BigBlueButton installation to versions 2.6.12 or 2.7.0-rc.1.
- collector/nvd-api
- agent/title
- agent/weakness
- agent/severity
- agent/references
- agent/author
- agent/tags
- agent/type
- agent/event
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- vendor/bigbluebutton
- canonical/bigbluebutton bigbluebutton
- version/bigbluebutton bigbluebutton/2.7.0-alpha1
- version/bigbluebutton bigbluebutton/2.7.0-alpha2
- version/bigbluebutton bigbluebutton/2.7.0-alpha3
- version/bigbluebutton bigbluebutton/2.7.0-beta1
- version/bigbluebutton bigbluebutton/2.7.0-beta2
- version/bigbluebutton bigbluebutton/2.7.0-beta3