BigBlueButton up to 2.6.17/2.7.7/3.0.0-alpha6 resque-2.6.0 privileges management

Summaryinfo

A vulnerability classified as critical has been found in BigBlueButton up to 2.6.17/2.7.7/3.0.0-alpha6. Impacted is an unknown function of the file /usr/local/bigbluebutton/core/vendor/bundle/ruby/2.7.0/gems/resque-2.6.0. This manipulation causes privileges management. The identification of this vulnerability is CVE-2024-39302. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in BigBlueButton up to 2.6.17/2.7.7/3.0.0-alpha6. It has been declared as critical. Affected by this vulnerability is some unknown processing of the file /usr/local/bigbluebutton/core/vendor/bundle/ruby/2.7.0/gems/resque-2.6.0. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker may be able to exploit the overly elevated file permissions in the `/usr/local/bigbluebutton/core/vendor/bundle/ruby/2.7.0/gems/resque-2.6.0` directory with the goal of privilege escalation, potentially exposing sensitive information on the server. This issue has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.

The advisory is shared at github.com. This vulnerability is known as CVE-2024-39302 since 06/21/2024. The exploitation appears to be difficult. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 2.6.18, 2.7.8 or 3.0.0-alpha7 eliminates this vulnerability. Applying the patch 04e916798b6b1f53f88513df3168f009b57b8f18 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• BigBlueButton

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 2.6.6
• 2.6.7
• 2.6.8
• 2.6.9
• 2.6.10
• 2.6.11
• 2.6.12
• 2.6.13
• 2.6.14
• 2.6.15
• 2.6.16
• 2.6.17
• 2.7.0
• 2.7.1
• 2.7.2
• 2.7.3
• 2.7.4
• 2.7.5
• 2.7.6
• 2.7.7
• 3.0.0-alpha6

License

• free

Website

• Product: https://github.com/bigbluebutton/bigbluebutton/

CPE 2.3info

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CPE 2.2info

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