PT-2023-28589 · Unknown · Bigbluebutton

Abdulmohsen Alotaibi · Published 2023-10-30 · Updated 2023-11-07 · CVE-2023-42803

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions BigBlueButton versions prior to 2.6.0-beta.2

Description BigBlueButton is an open-source virtual classroom. The issue arises from the insertDocument API call not validating the given file extension before saving the file and not removing it in case of validation failures, leading to unrestricted file upload.

Recommendations For versions prior to 2.6.0-beta.2, update to version 2.6.0-beta.2 or later to resolve the issue. As a temporary workaround, consider restricting access to the insertDocument API call until a patch is applied. Avoid using the insertDocument API call with untrusted file sources until the issue is resolved.

Exploit

Fix

Unrestricted File Upload

Weakness Enumeration

CWE-434

Related Identifiers

CVE-2023-42803

GHSA-W98F-6X8W-XHJC

Affected Products

Bigbluebutton

References · 7

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42803.json · Exploit
• https://osv.dev/vulnerability/CVE-2023-42803 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-42803 · Security Note
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-w98f-6x8w-xhjc · Note
• https://github.com/bigbluebutton/bigbluebutton/pull/15990 · Note
• https://twitter.com/CVEnew/status/1719061477280411728 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1719090705136582788 · Twitter Post