VDB-202870 · CVE-2022-31039 · GHSA-phh8-3v6v-7498

BigBlueButton Greenlight up to 2.12.5 Room Setting privileges management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.6	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in BigBlueButton Greenlight up to 2.12.5. This affects an unknown function of the component Room Setting Handler. Executing a manipulation can lead to privileges management. This vulnerability is registered as CVE-2022-31039. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in BigBlueButton Greenlight up to 2.12.5. This vulnerability affects an unknown part of the component Room Setting Handler. 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. CVE summarizes:

Greenlight is a simple front-end interface for your BigBlueButton server. In affected versions an attacker can view any room's settings even though they are not authorized to do so. Only the room owner and administrator should be able to view a room's settings. This issue has been patched in release version 2.12.6.

The weakness was published 06/28/2022 as GHSA-phh8-3v6v-7498. The advisory is available at github.com. This vulnerability was named CVE-2022-31039 since 05/18/2022. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 2.12.6 eliminates this vulnerability. Applying a patch 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

Vendor

BigBlueButton

Name

Greenlight

Version

License

free

Website

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

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CNA Base Score: 4.3
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Greenlight 2.12.6
Patch: github.com

Timelineinfo

05/18/2022 🔍
06/28/2022 +41 days 🔍
06/28/2022 +0 days 🔍
07/16/2022 +18 days 🔍

Sourcesinfo

Product: github.com

Advisory: GHSA-phh8-3v6v-7498
Status: Confirmed

CVE: CVE-2022-31039 (🔍)
GCVE (CVE): GCVE-0-2022-31039
GCVE (VulDB): GCVE-100-202870

Entryinfo

Created: 06/28/2022 08:28
Updated: 07/16/2022 08:56
Changes: 06/28/2022 08:28 (33), 06/28/2022 08:29 (19), 07/16/2022 08:56 (18)
Complete: 🔍
Cache ID: 216::103