PT-2023-28590 · Unknown · Bigbluebutton

Abdulmohsen Alotaibi · Published 2023-10-30 · Updated 2023-11-07 · CVE-2023-42804

Positive Technologies (AI Summary)

CVSS v3.1

3.1

Low

Base vector

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

Name of the Vulnerable Software and Affected Versions BigBlueButton versions prior to 2.6.0-beta.1

Description BigBlueButton is an open-source virtual classroom. It has a path traversal vulnerability that allows an attacker with a valid starting folder path to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped.

Recommendations For versions prior to 2.6.0-beta.1, update to version 2.6.0-beta.1 or later, which includes input validation and strips dangerous characters from parameters. As a temporary workaround, consider restricting access to sensitive files and directories to minimize the risk of exploitation.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2023-42804

GHSA-3QJG-229M-VQ84

Affected Products

Bigbluebutton

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42804.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-42804 · Security Note
• https://osv.dev/vulnerability/CVE-2023-42804 · Vendor Advisory
• https://github.com/bigbluebutton/bigbluebutton/pull/15960 · Note
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84 · Note
• https://t.me/cibsecurity/73173 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1719090958401212449 · Twitter Post
• https://twitter.com/CVEnew/status/1719061475887890874 · Twitter Post