Vulnerability identifier: #VU82582

Vulnerability risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-42804

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BigBlueButton
Web applications / Modules and components for CMS

Vendor: Blindside Networks

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

BigBlueButton: 2.0 - 2.5.14

---

External links
http://github.com/bigbluebutton/bigbluebutton/pull/15960
http://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.