Multiple vulnerabilities in BigBlueButton plugin for WordPress

Published: 2020-11-30

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-29042 CVE-2020-29043
CWE-ID	CWE-307 CWE-862
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	BigBlueButton Web applications / Modules and components for CMS
Vendor	Blindside Networks

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Restriction of Excessive Authentication Attempts

EUVDB-ID: #VU48705

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-29042

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to the system.

The vulnerability exists due to the two-factor authentication has no brute-force prevention. A remote attacker can launch a brute-force authentication attack and gain access to the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BigBlueButton: 0.7 - 3.0.0 beta.4

External links

http://packetstormsecurity.com/files/160238/BigBlueButton-2.2.29-Brute-Force.html
http://cxsecurity.com/issue/WLB-2020110210
http://github.com/bigbluebutton/bigbluebutton/releases

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Missing Authorization

EUVDB-ID: #VU48706

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-29043

CWE-ID: CWE-862 - Missing Authorization