CVE-2023-5543 Moodle: duplicating a bigbluebutton activity assigns the same meeting id

What is CVE-2023-5543?

CVE-2023-5543 is a low-severity missing authorization vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 9 Nov 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

When duplicating a BigBlueButton activity, the original meeting ID was also duplicated instead of using a new ID for the new activity. This could provide unintended access to the original meeting.

Weakness: CWE-284

Which versions are affected by CVE-2023-5543?

1 open source package ship an affected version, including moodle. It affects 3 products.

Products include Fedoraproject Extra Packages for Enterprise Linux, Fedoraproject Fedora, Moodle Moodle.

How do I fix CVE-2023-5543?

Upgrade moodle to a fixed version for your release line: 4.0.11, 4.1.6 or 4.2.3.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-5543 being exploited?

There is no known exploitation of CVE-2023-5543 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Extra Packages for Enterprise Linux

• CVE-2023-34152 Command injection in ImageMagick Critical 9.8
• CVE-2022-4170 Code injection in rxvt-unicode Critical 9.8
• CVE-2022-40315 Moodle Minor SQL injection risk in admin user browsing Critical 9.8
• CVE-2022-45152 Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library Critical 9.1
• CVE-2022-24882 Server side NTLM does not properly check parameters in FreeRDP Critical 9.1

All Fedoraproject Extra Packages for Enterprise Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-moodle-2023-5543, GHSA-p657-7739-2grh, UBUNTU-CVE-2023-5543.